feat(core): add support for U5A5 MCU

diff --git a/core/embed/io/Cargo.toml b/core/embed/io/Cargo.toml
index 1a308ee3..3eb53f04 100644
--- a/core/embed/io/Cargo.toml
+++ b/core/embed/io/Cargo.toml
@@ -24,6 +24,7 @@ mcu_stm32f427 = ["sec/mcu_stm32f427", "mcu_stm32f4"]
 mcu_stm32f429 = ["sec/mcu_stm32f429", "mcu_stm32f4"]
 mcu_stm32u58 = ["sec/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["sec/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["sec/mcu_stm32u5a", "mcu_stm32u5"]
 
 # --------------------------------------------------------------------------
 # Privilege mode features
diff --git a/core/embed/models/Cargo.toml b/core/embed/models/Cargo.toml
index 9634e76f..c15b5195 100644
--- a/core/embed/models/Cargo.toml
+++ b/core/embed/models/Cargo.toml
@@ -33,6 +33,7 @@ mcu_stm32f427 = ["mcu_stm32f4"]
 mcu_stm32f429 = ["mcu_stm32f4"]
 mcu_stm32u58 = ["mcu_stm32u5"]
 mcu_stm32u5g = ["mcu_stm32u5"]
+mcu_stm32u5a = ["mcu_stm32u5"]
 
 # --------------------------------------------------------------------------
 # Privilege mode features
diff --git a/core/embed/projects/boardloader/Cargo.toml b/core/embed/projects/boardloader/Cargo.toml
index 6fd800d7..e5733a0d 100644
--- a/core/embed/projects/boardloader/Cargo.toml
+++ b/core/embed/projects/boardloader/Cargo.toml
@@ -52,6 +52,7 @@ mcu_stm32f429 = ["io/mcu_stm32f429", "mcu_stm32f4"]
 mcu_stm32f4 = []
 mcu_stm32u58 = ["io/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["io/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["io/mcu_stm32u5a", "mcu_stm32u5"]
 mcu_stm32u5 = ["sec/trustzone"]
 
 backlight = ["io/backlight"]
diff --git a/core/embed/projects/bootloader/Cargo.toml b/core/embed/projects/bootloader/Cargo.toml
index 27dfb56c..50e40088 100644
--- a/core/embed/projects/bootloader/Cargo.toml
+++ b/core/embed/projects/bootloader/Cargo.toml
@@ -62,6 +62,7 @@ mcu_stm32f429 = ["io/mcu_stm32f429", "mcu_stm32f4"]
 mcu_stm32f4 = []
 mcu_stm32u58 = ["io/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["io/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["io/mcu_stm32u5a", "mcu_stm32u5"]
 mcu_stm32u5 = ["sec/trustzone"]
 
 backlight = ["io/backlight", "trezor_lib/backlight"]
diff --git a/core/embed/projects/bootloader_ci/Cargo.toml b/core/embed/projects/bootloader_ci/Cargo.toml
index c3419104..3271edbd 100644
--- a/core/embed/projects/bootloader_ci/Cargo.toml
+++ b/core/embed/projects/bootloader_ci/Cargo.toml
@@ -53,6 +53,7 @@ mcu_stm32f429 = ["io/mcu_stm32f429", "mcu_stm32f4"]
 mcu_stm32f4 = ["io/mcu_stm32f4"]
 mcu_stm32u58 = ["io/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["io/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["io/mcu_stm32u5a", "mcu_stm32u5"]
 mcu_stm32u5 = ["sec/trustzone"]
 
 backlight = ["io/backlight"]
diff --git a/core/embed/projects/firmware/Cargo.toml b/core/embed/projects/firmware/Cargo.toml
index 7e900584..98aa201b 100644
--- a/core/embed/projects/firmware/Cargo.toml
+++ b/core/embed/projects/firmware/Cargo.toml
@@ -75,6 +75,7 @@ mcu_stm32f429 = ["io/mcu_stm32f429", "upymod/mcu_stm32f429", "mcu_stm32f4"]
 mcu_stm32f4 = ["mcu_stm32"]
 mcu_stm32u58 = ["io/mcu_stm32u58", "upymod/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["io/mcu_stm32u5g", "upymod/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["io/mcu_stm32u5a", "upymod/mcu_stm32u5a", "mcu_stm32u5"]
 mcu_stm32u5 = ["sec/trustzone", "mcu_stm32"]
 mcu_stm32 = []
 
diff --git a/core/embed/projects/kernel/Cargo.toml b/core/embed/projects/kernel/Cargo.toml
index a00d6c24..5f197d9d 100644
--- a/core/embed/projects/kernel/Cargo.toml
+++ b/core/embed/projects/kernel/Cargo.toml
@@ -59,6 +59,7 @@ mcu_stm32f429 = ["io/mcu_stm32f429", "mcu_stm32f4"]
 mcu_stm32f4 = []
 mcu_stm32u58 = ["io/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["io/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["io/mcu_stm32u5a", "mcu_stm32u5"]
 mcu_stm32u5 = ["sec/trustzone"]
 
 secure_mode = ["io/secure_mode"]
diff --git a/core/embed/projects/prodtest/Cargo.toml b/core/embed/projects/prodtest/Cargo.toml
index b8b38529..d3e532e0 100644
--- a/core/embed/projects/prodtest/Cargo.toml
+++ b/core/embed/projects/prodtest/Cargo.toml
@@ -62,6 +62,7 @@ mcu_stm32f429 = ["io/mcu_stm32f429", "mcu_stm32f4"]
 mcu_stm32f4 = []
 mcu_stm32u58 = ["io/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["io/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["io/mcu_stm32u5a", "mcu_stm32u5"]
 mcu_stm32u5 = ["sec/trustzone"]
 
 backlight = ["io/backlight", "trezor_lib/backlight"]
diff --git a/core/embed/projects/secmon/Cargo.toml b/core/embed/projects/secmon/Cargo.toml
index a1f686ee..447e806e 100644
--- a/core/embed/projects/secmon/Cargo.toml
+++ b/core/embed/projects/secmon/Cargo.toml
@@ -54,6 +54,7 @@ default = [
 
 mcu_stm32u58 = ["sec/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["sec/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["sec/mcu_stm32u5a", "mcu_stm32u5"]
 mcu_stm32u5 = ["sec/trustzone"]
 
 backup_ram = ["sec/backup_ram"]
diff --git a/core/embed/projects/unix/Cargo.toml b/core/embed/projects/unix/Cargo.toml
index 02c96934..0119d161 100644
--- a/core/embed/projects/unix/Cargo.toml
+++ b/core/embed/projects/unix/Cargo.toml
@@ -76,6 +76,7 @@ mcu_stm32f429 = ["io/mcu_stm32f429", "upymod/mcu_stm32f429", "mcu_stm32f4"]
 mcu_stm32f4 = ["mcu_stm32"]
 mcu_stm32u58 = ["io/mcu_stm32u58", "upymod/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["io/mcu_stm32u5g", "upymod/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["io/mcu_stm32u5a", "upymod/mcu_stm32u5a", "mcu_stm32u5"]
 mcu_stm32u5 = ["sec/trustzone",  "mcu_stm32"]
 mcu_stm32 = []
 
diff --git a/core/embed/sec/Cargo.toml b/core/embed/sec/Cargo.toml
index 1d16ed1b..3106447c 100644
--- a/core/embed/sec/Cargo.toml
+++ b/core/embed/sec/Cargo.toml
@@ -23,6 +23,7 @@ mcu_stm32f427 = ["sys/mcu_stm32f427", "mcu_stm32f4"]
 mcu_stm32f429 = ["sys/mcu_stm32f429", "mcu_stm32f4"]
 mcu_stm32u58 = ["sys/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["sys/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["sys/mcu_stm32u5a", "mcu_stm32u5"]
 
 # --------------------------------------------------------------------------
 # Privilege mode features
diff --git a/core/embed/sec/option_bytes/stm32u5/option_bytes.c b/core/embed/sec/option_bytes/stm32u5/option_bytes.c
index c652a4bc..4215ffe9 100644
--- a/core/embed/sec/option_bytes/stm32u5/option_bytes.c
+++ b/core/embed/sec/option_bytes/stm32u5/option_bytes.c
@@ -47,7 +47,7 @@
 #error "VDD_3V3 or VDD_1V8 must be defined"
 #endif
 
-#if defined STM32U5A9xx | defined STM32U5G9xx
+#if defined STM32U5A9xx | defined STM32U5G9xx | defined STM32U5A5xx
 #define WRP_DEFAULT_VALUE 0xFF00FFFF
 #define SEC_WM1R1_DEFAULT_VALUE 0xFF00FF00
 #define SEC_WM1R2_DEFAULT_VALUE 0x7F007F00
diff --git a/core/embed/sys/Cargo.toml b/core/embed/sys/Cargo.toml
index 673746ce..088edfbb 100644
--- a/core/embed/sys/Cargo.toml
+++ b/core/embed/sys/Cargo.toml
@@ -22,6 +22,7 @@ mcu_stm32f427 = ["models/mcu_stm32f427", "mcu_stm32f4"]
 mcu_stm32f429 = ["models/mcu_stm32f429", "mcu_stm32f4"]
 mcu_stm32u58 = ["models/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["models/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["models/mcu_stm32u5a", "mcu_stm32u5"]
 
 # --------------------------------------------------------------------------
 # Privilege mode features
diff --git a/core/embed/sys/bsp/build.rs b/core/embed/sys/bsp/build.rs
index 81bdea20..254b6f5c 100644
--- a/core/embed/sys/bsp/build.rs
+++ b/core/embed/sys/bsp/build.rs
@@ -19,6 +19,8 @@ pub fn def_module(lib: &mut CLibrary) -> Result<()> {
 fn add_stm32u5_bsp(lib: &mut CLibrary) -> Result<()> {
     if cfg!(feature = "mcu_stm32u5g") {
         lib.add_define("STM32U5G9xx", None);
+    } else if cfg!(feature = "mcu_stm32u5a") {
+        lib.add_define("STM32U5A5xx", None);
     } else if cfg!(feature = "mcu_stm32u58") {
         lib.add_define("STM32U585xx", None);
     } else {
diff --git a/core/embed/sys/flash/build.rs b/core/embed/sys/flash/build.rs
index 4d026078..90dfbd26 100644
--- a/core/embed/sys/flash/build.rs
+++ b/core/embed/sys/flash/build.rs
@@ -35,6 +35,8 @@ pub fn def_module(lib: &mut CLibrary) -> Result<()> {
 
             if cfg!(feature = "mcu_stm32u5g") {
                 lib.add_define("STM32U5G9xx", None);
+            } else if cfg!(feature = "mcu_stm32u5a") {
+                lib.add_define("STM32U5A5xx", None);
             } else if cfg!(feature = "mcu_stm32u58") {
                 lib.add_define("STM32U585xx", None);
             } else {
diff --git a/core/embed/sys/linker/inc/sys/linker_utils.h b/core/embed/sys/linker/inc/sys/linker_utils.h
index 528be071..66eec4f7 100644
--- a/core/embed/sys/linker/inc/sys/linker_utils.h
+++ b/core/embed/sys/linker/inc/sys/linker_utils.h
@@ -94,6 +94,17 @@ typedef struct {
             },                                    \
     };                                            \
   })
+#elif defined(STM32U5A5xx)
+#define MEMREGION_ALL_STARTUP_RAM                 \
+  ({                                              \
+    (memregion_t){                                \
+        .block =                                  \
+            {                                     \
+                MEMBLOCK(SRAM1_BASE, SIZE_2496K), \
+                MEMBLOCK(SRAM4_BASE, SIZE_16K),   \
+            },                                    \
+    };                                            \
+  })
 #else
 #error "Unknown STM32 family"
 #endif
diff --git a/core/embed/sys/linker/stm32u5a/boardloader.ld b/core/embed/sys/linker/stm32u5a/boardloader.ld
new file mode 100644
index 00000000..e4e8850b
--- /dev/null
+++ b/core/embed/sys/linker/stm32u5a/boardloader.ld
@@ -0,0 +1,86 @@
+ENTRY(reset_handler)
+
+MEMORY {
+  FLASH (rx)     : ORIGIN = BOARDLOADER_START, LENGTH = BOARDLOADER_MAXSIZE
+  BOARDCAPS (rw) : ORIGIN = BOARDCAPS_START, LENGTH = BOARDCAPS_MAXSIZE
+  MAIN_RAM (rw)  : ORIGIN = MAIN_RAM_START, LENGTH = MAIN_RAM_SIZE
+  AUX1_RAM (rw)  : ORIGIN = AUX1_RAM_START, LENGTH = AUX1_RAM_SIZE
+  BOOT_ARGS (rw) : ORIGIN = BOOTARGS_START, LENGTH = BOOTARGS_SIZE
+  FB1_RAM (rw)   : ORIGIN = FB1_RAM_START, LENGTH = FB1_RAM_SIZE
+  FB2_RAM (rw)   : ORIGIN = FB2_RAM_START, LENGTH = FB2_RAM_SIZE
+}
+
+_stack_section_start = ADDR(.stack);
+_stack_section_end = ADDR(.stack) + SIZEOF(.stack);
+
+_data_section_loadaddr = LOADADDR(.data);
+_data_section_start = ADDR(.data);
+_data_section_end = ADDR(.data) + SIZEOF(.data);
+
+_bss_section_start = ADDR(.bss);
+_bss_section_end = ADDR(.bss) + SIZEOF(.bss);
+
+_bootargs_ram_start = BOOTARGS_START;
+_bootargs_ram_end = BOOTARGS_START + BOOTARGS_SIZE;
+
+
+SECTIONS {
+  .vector_table : ALIGN(CODE_ALIGNMENT) {
+    KEEP(*(.vector_table));
+  } >FLASH AT>FLASH
+
+  .text : ALIGN(4) {
+    *(.text*);
+    . = ALIGN(4); /* make the section size a multiple of the word size */
+  } >FLASH AT>FLASH
+
+  .rodata : ALIGN(4) {
+    *(.rodata*);
+    . = ALIGN(4); /* make the section size a multiple of the word size */
+  } >FLASH AT>FLASH
+
+  .data : ALIGN(4) {
+    *(.data*);
+    . = ALIGN(8);
+  } >MAIN_RAM AT>FLASH
+
+  /DISCARD/ : {
+    *(.ARM.exidx*);
+  }
+
+  .bss : ALIGN(4) {
+    *(.bss*);
+    . = ALIGN(4);
+  } >MAIN_RAM
+
+  .buf : ALIGN(4) {
+    *(.buf*);
+    . = ALIGN(4);
+  } >AUX1_RAM
+
+  .stack : ALIGN(8) {
+    . += 16K; /* Overflow causes UsageFault */
+  } >MAIN_RAM
+
+  .fb1 : ALIGN(4) {
+    *(.fb1*);
+    . = ALIGN(4);
+  } >FB1_RAM
+
+  .fb2 : ALIGN(4) {
+    *(.fb2*);
+    . = ALIGN(4);
+  } >FB2_RAM
+
+  .boot_args : ALIGN(8) {
+    *(.boot_command*);
+    . = ALIGN(8);
+    *(.boot_args*);
+    . = ALIGN(8);
+  } >BOOT_ARGS
+
+  .capabilities : ALIGN(4) {
+    KEEP(*(.capabilities_section*));
+    . = ALIGN(4);
+  } >BOARDCAPS
+}
diff --git a/core/embed/sys/linker/stm32u5a/bootloader.ld b/core/embed/sys/linker/stm32u5a/bootloader.ld
new file mode 100644
index 00000000..5ea8a9e5
--- /dev/null
+++ b/core/embed/sys/linker/stm32u5a/bootloader.ld
@@ -0,0 +1,91 @@
+ENTRY(reset_handler)
+
+MEMORY {
+  FLASH  (rx)    : ORIGIN = BOOTLOADER_START, LENGTH = BOOTLOADER_MAXSIZE
+  MAIN_RAM (rw)  : ORIGIN = MAIN_RAM_START, LENGTH = MAIN_RAM_SIZE
+  AUX1_RAM (rw)  : ORIGIN = AUX1_RAM_START, LENGTH = AUX1_RAM_SIZE
+  BOOT_ARGS (rw) : ORIGIN = BOOTARGS_START, LENGTH = BOOTARGS_SIZE
+  FB1_RAM (rw)   : ORIGIN = FB1_RAM_START, LENGTH = FB1_RAM_SIZE
+  FB2_RAM (rw)   : ORIGIN = FB2_RAM_START, LENGTH = FB2_RAM_SIZE
+}
+
+_stack_section_start = ADDR(.stack);
+_stack_section_end = ADDR(.stack) + SIZEOF(.stack);
+
+_data_section_loadaddr = LOADADDR(.data);
+_data_section_start = ADDR(.data);
+_data_section_end = ADDR(.data) + SIZEOF(.data);
+
+_bss_section_start = ADDR(.bss);
+_bss_section_end = ADDR(.bss) + SIZEOF(.bss);
+
+_bootargs_ram_start = BOOTARGS_START;
+_bootargs_ram_end = BOOTARGS_START + BOOTARGS_SIZE;
+
+_codelen = _bootloader_code_end - ADDR(.flash);
+
+SECTIONS {
+  .header : ALIGN(4) {
+    KEEP(*(.header));
+  } >FLASH AT>FLASH
+
+  .flash : ALIGN(CODE_ALIGNMENT) {
+    KEEP(*(.vector_table));
+    . = ALIGN(4);
+    *(.text*);
+    . = ALIGN(4);
+    *(.rodata*);
+    . = ALIGN(4);
+  } >FLASH AT>FLASH
+
+  .data : ALIGN(4) {
+    *(.data*);
+    . = ALIGN(4);
+  } >MAIN_RAM AT>FLASH
+
+  /DISCARD/ : {
+    *(.ARM.exidx*);
+  }
+
+  .bss : ALIGN(4) {
+    *(.bss*);
+    . = ALIGN(4);
+  } >MAIN_RAM
+
+  .buf : ALIGN(4) {
+    *(.buf*);
+    . = ALIGN(4);
+    *(.no_dma_buffers*);
+    . = ALIGN(4);
+  } >AUX1_RAM
+
+  .stack : ALIGN(8) {
+    . += 16K; /* Overflow causes UsageFault */
+  } >MAIN_RAM
+
+  .fb1 : ALIGN(4) {
+    *(.fb1*);
+    . = ALIGN(4);
+  } >FB1_RAM
+
+  .fb2 : ALIGN(4) {
+    *(.fb2*);
+    . = ALIGN(4);
+  } >FB2_RAM
+
+  .boot_args : ALIGN(8) {
+    *(.boot_command*);
+    . = ALIGN(8);
+    *(.boot_args*);
+    . = ALIGN(8);
+  } >BOOT_ARGS
+
+  .flash : ALIGN(4) {
+    /* Pad the rest of bootloader area with zeros */
+    BYTE(0x00)
+    FILL(0x00)
+    /* Use alignment required by the boardloader */
+    . = ALIGN(512);
+    _bootloader_code_end = .;
+  } >FLASH
+}
diff --git a/core/embed/sys/linker/stm32u5a/firmware.ld b/core/embed/sys/linker/stm32u5a/firmware.ld
new file mode 100644
index 00000000..74fffeb6
--- /dev/null
+++ b/core/embed/sys/linker/stm32u5a/firmware.ld
@@ -0,0 +1,92 @@
+ENTRY(reset_handler)
+
+MEMORY {
+  FLASH  (rx)   : ORIGIN = FIRMWARE_START, LENGTH = FIRMWARE_MAXSIZE
+  AUX1_RAM (rw) : ORIGIN = AUX1_RAM_START, LENGTH = AUX1_RAM_SIZE
+}
+
+_stack_section_start = ADDR(.stack);
+_stack_section_end = ADDR(.stack) + SIZEOF(.stack);
+_stack_section_size = SIZEOF(.stack);
+
+_data_section_loadaddr = LOADADDR(.data);
+_data_section_start = ADDR(.data);
+_data_section_end = ADDR(.data) + SIZEOF(.data);
+
+_bss_section_start = ADDR(.bss);
+_bss_section_end = ADDR(.bss) + SIZEOF(.bss);
+
+_tls_section_start = ADDR(.tls);
+_tls_section_size = SIZEOF(.tls);
+
+_codelen = SIZEOF(.padding) + SIZEOF(.flash) + SIZEOF(.data);
+
+_heap_start = ADDR(.heap);
+_heap_end = ADDR(.heap) + SIZEOF(.heap);
+
+SECTIONS {
+  .vendorheader : ALIGN(4) {
+    KEEP(*(.vendorheader))
+  } >FLASH AT>FLASH
+
+  .header : ALIGN(4) {
+    KEEP(*(.header));
+  } >FLASH AT>FLASH
+
+  .padding : ALIGN(4) {
+    . = ALIGN(4);
+    . = ALIGN(CODE_ALIGNMENT);
+  } >FLASH AT>FLASH
+
+  .flash : ALIGN(CODE_ALIGNMENT) {
+    KEEP(*(.kernel));
+    . = ALIGN(COREAPP_ALIGNMENT);
+    KEEP(*(.coreapp_header));
+    . = ALIGN(4);
+    *(.text*);
+    . = ALIGN(4);
+    *(.rodata*);
+    . = ALIGN(4);
+    KEEP(*(.nrf_app));
+    *(.nrf_app*);
+    . = ALIGN(4);
+    KEEP(*(.bootloader));
+    *(.bootloader*);
+    . = ALIGN(512);
+  } >FLASH AT>FLASH
+
+  .stack : ALIGN(8) {
+    . += 32K; /* Overflow causes UsageFault */
+  } >AUX1_RAM
+
+  .data : ALIGN(4) {
+    *(.data*);
+    . = ALIGN(512);
+  } >AUX1_RAM AT>FLASH
+
+  /DISCARD/ : {
+    *(.ARM.exidx*);
+  }
+
+  .tls : ALIGN(32) {
+    *(.tls*);  /* 32-byte alignment required by MPU */
+    . = ALIGN(32);
+  } > AUX1_RAM
+
+  .bss : ALIGN(4) {
+    *(.no_dma_buffers*);
+    *(.bss*);
+    . = ALIGN(4);
+  } >AUX1_RAM
+
+  .buf : ALIGN(4) {
+    *(.buf*);
+    . = ALIGN(4);
+  } >AUX1_RAM
+
+  .heap : ALIGN(4) {
+    . = 37K; /* this acts as a build time assertion that at least this much memory is available for heap use */
+    . = ABSOLUTE(ORIGIN(AUX1_RAM) + LENGTH(AUX1_RAM)); /* this explicitly sets the end of the heap */
+  } >AUX1_RAM
+
+}
diff --git a/core/embed/sys/linker/stm32u5a/kernel.ld b/core/embed/sys/linker/stm32u5a/kernel.ld
new file mode 100644
index 00000000..07b7a608
--- /dev/null
+++ b/core/embed/sys/linker/stm32u5a/kernel.ld
@@ -0,0 +1,94 @@
+ENTRY(reset_handler)
+
+MEMORY {
+  FLASH  (rx)    : ORIGIN = FIRMWARE_START, LENGTH = FIRMWARE_MAXSIZE
+  MAIN_RAM (rw)  : ORIGIN = MAIN_RAM_START, LENGTH = MAIN_RAM_SIZE
+  BOOT_ARGS (rw) : ORIGIN = BOOTARGS_START, LENGTH = BOOTARGS_SIZE
+  FB1_RAM (rw)   : ORIGIN = FB1_RAM_START, LENGTH = FB1_RAM_SIZE
+  FB2_RAM (rw)   : ORIGIN = FB2_RAM_START, LENGTH = FB2_RAM_SIZE
+}
+
+_stack_section_start = ADDR(.stack);
+_stack_section_end = ADDR(.stack) + SIZEOF(.stack);
+
+_data_section_loadaddr = LOADADDR(.data);
+_data_section_start = ADDR(.data);
+_data_section_end = ADDR(.data) + SIZEOF(.data);
+
+_bss_section_start = ADDR(.bss);
+_bss_section_end = ADDR(.bss) + SIZEOF(.bss);
+
+_bootargs_ram_start = BOOTARGS_START;
+_bootargs_ram_end = BOOTARGS_START + BOOTARGS_SIZE;
+
+_codelen = _kernel_flash_end - ORIGIN(FLASH);
+
+SECTIONS {
+  .vendorheader : ALIGN(4) {
+    KEEP(*(.vendorheader))
+  } >FLASH AT>FLASH
+
+  .header : ALIGN(4) {
+    . += 1K;
+    . = ALIGN(CODE_ALIGNMENT);
+  } >FLASH AT>FLASH
+
+  .flash : ALIGN(CODE_ALIGNMENT) {
+    KEEP(*(.secmon));
+  } >FLASH AT>FLASH
+
+  .flash : ALIGN(CODE_ALIGNMENT) {
+    _kernel_flash_start = .;
+    KEEP(*(.vector_table));
+    . = ALIGN(4);
+    *(.text*);
+    . = ALIGN(4);
+    *(.rodata*);
+    . = ALIGN(512);
+  } >FLASH AT>FLASH
+
+  .stack : ALIGN(8) {
+    . += 12K; /* Overflow causes UsageFault */
+  } >MAIN_RAM
+
+  .data : ALIGN(4) {
+    *(.data*);
+    . = ALIGN(512);
+  } >MAIN_RAM AT>FLASH
+
+  /DISCARD/ : {
+    *(.ARM.exidx*);
+  }
+
+  .bss : ALIGN(4) {
+    *(.no_dma_buffers*);
+    *(.bss*);
+    . = ALIGN(4);
+  } >MAIN_RAM
+
+  .fb1 : ALIGN(4) {
+    *(.fb1*);
+    . = ALIGN(4);
+  } >FB1_RAM
+
+  .fb2 : ALIGN(4) {
+    *(.fb2*);
+    . = ALIGN(4);
+  } >FB2_RAM
+
+  .buf : ALIGN(4) {
+    *(.buf*);
+    . = ALIGN(4);
+  } >MAIN_RAM
+
+  .boot_args : ALIGN(8) {
+    *(.boot_command*);
+    . = ALIGN(8);
+    *(.boot_args*);
+    . = ALIGN(8);
+  } >BOOT_ARGS
+
+  .flash : ALIGN(4) {
+    _kernel_flash_end = .;
+  } >FLASH
+}
diff --git a/core/embed/sys/linker/stm32u5a/prodtest.ld b/core/embed/sys/linker/stm32u5a/prodtest.ld
new file mode 100644
index 00000000..3c50cf1c
--- /dev/null
+++ b/core/embed/sys/linker/stm32u5a/prodtest.ld
@@ -0,0 +1,101 @@
+ENTRY(reset_handler)
+
+MEMORY {
+  FLASH  (rx)    : ORIGIN = FIRMWARE_START, LENGTH = FIRMWARE_MAXSIZE
+  MAIN_RAM (rw)  : ORIGIN = MAIN_RAM_START, LENGTH = MAIN_RAM_SIZE
+  AUX1_RAM (rw)  : ORIGIN = AUX1_RAM_START, LENGTH = AUX1_RAM_SIZE
+  BOOT_ARGS (rw) : ORIGIN = BOOTARGS_START, LENGTH = BOOTARGS_SIZE
+  FB1_RAM (rw)   : ORIGIN = FB1_RAM_START, LENGTH = FB1_RAM_SIZE
+  FB2_RAM (rw)   : ORIGIN = FB2_RAM_START, LENGTH = FB2_RAM_SIZE
+}
+
+_stack_section_start = ADDR(.stack);
+_stack_section_end = ADDR(.stack) + SIZEOF(.stack);
+
+_data_section_loadaddr = LOADADDR(.data);
+_data_section_start = ADDR(.data);
+_data_section_end = ADDR(.data) + SIZEOF(.data);
+
+_bss_section_start = ADDR(.bss);
+_bss_section_end = ADDR(.bss) + SIZEOF(.bss);
+
+_bootargs_ram_start = BOOTARGS_START;
+_bootargs_ram_end = BOOTARGS_START + BOOTARGS_SIZE;
+
+_codelen = _image_flash_end - ADDR(.flash);
+
+SECTIONS {
+  .vendorheader : ALIGN(4) {
+    KEEP(*(.vendorheader))
+  } >FLASH AT>FLASH
+
+  .header : ALIGN(4) {
+    KEEP(*(.header));
+  } >FLASH AT>FLASH
+
+  .flash : ALIGN(CODE_ALIGNMENT) {
+    KEEP(*(.vector_table));
+    . = ALIGN(4);
+    *(.text*);
+    . = ALIGN(4);
+    *(.rodata*);
+    . = ALIGN(4);
+
+    _prodtest_cli_cmd_section_start = .;
+    KEEP(*(.prodtest_cli_cmd))
+    _prodtest_cli_cmd_section_end = .;
+    . = ALIGN(4);
+
+    _unit_test_section_start = .;
+    KEEP(*(.unit_test))
+    _unit_test_section_end = .;
+
+    . = ALIGN(512);
+  } >FLASH AT>FLASH
+
+  .data : ALIGN(4) {
+    *(.data*);
+    . = ALIGN(512);
+  } >AUX1_RAM AT>FLASH
+
+  /DISCARD/ : {
+    *(.ARM.exidx*);
+  }
+
+  /* End of code/data in FLASH */
+  _image_flash_end = LOADADDR(.data) + SIZEOF(.data);
+
+  .bss : ALIGN(4) {
+    *(.bss*);
+    . = ALIGN(4);
+  } >AUX1_RAM
+
+  /* D003 has no AUX2_RAM, so .buf shares AUX1_RAM with .data/.bss. */
+  .buf : ALIGN(4) {
+    *(.buf*);
+    . = ALIGN(4);
+    *(.no_dma_buffers*);
+    . = ALIGN(4);
+  } >AUX1_RAM
+
+  .stack : ALIGN(8) {
+    . += 16K; /* Overflow causes UsageFault */
+  } >MAIN_RAM
+
+  .fb1 : ALIGN(4) {
+    *(.fb1*);
+    . = ALIGN(4);
+  } >FB1_RAM
+
+  .fb2 : ALIGN(4) {
+    *(.fb2*);
+    . = ALIGN(4);
+  } >FB2_RAM
+
+  .boot_args : ALIGN(8) {
+    *(.boot_command*);
+    . = ALIGN(8);
+    *(.boot_args*);
+    . = ALIGN(8);
+  } >BOOT_ARGS
+}
diff --git a/core/embed/sys/linker/stm32u5a/secmon.ld b/core/embed/sys/linker/stm32u5a/secmon.ld
new file mode 100644
index 00000000..cc9f54d3
--- /dev/null
+++ b/core/embed/sys/linker/stm32u5a/secmon.ld
@@ -0,0 +1,112 @@
+ENTRY(reset_handler)
+
+MEMORY {
+  FLASH (rx)     : ORIGIN = FIRMWARE_START_S, LENGTH = FIRMWARE_MAXSIZE
+  RAM (rw)       : ORIGIN = SECMON_RAM_START, LENGTH = SECMON_RAM_SIZE
+  BOOT_ARGS (rw) : ORIGIN = BOOTARGS_START, LENGTH = BOOTARGS_SIZE
+  FB1_RAM (rw)   : ORIGIN = FB1_RAM_START, LENGTH = FB1_RAM_SIZE
+  FB2_RAM (rw)   : ORIGIN = FB2_RAM_START, LENGTH = FB2_RAM_SIZE
+}
+
+_sgstubs_section_start = ADDR(.gnu.sgstubs);
+_sgstubs_section_end = ADDR(.gnu.sgstubs) + SIZEOF(.gnu.sgstubs);
+
+_stack_section_start = ADDR(.stack);
+_stack_section_end = ADDR(.stack) + SIZEOF(.stack);
+
+_data_section_loadaddr = LOADADDR(.data);
+_data_section_start = ADDR(.data);
+_data_section_end = ADDR(.data) + SIZEOF(.data);
+
+_bss_section_start = ADDR(.bss);
+_bss_section_end = ADDR(.bss) + SIZEOF(.bss);
+
+_bootargs_ram_start = BOOTARGS_START;
+_bootargs_ram_end = BOOTARGS_START + BOOTARGS_SIZE;
+
+_codelen = _secmon_flash_end - _secmon_code_start;
+_secmon_size = _secmon_flash_end - ORIGIN(FLASH);
+
+SECTIONS {
+  .vendorheader : ALIGN(4) {
+    KEEP(*(.vendorheader))
+  } >FLASH
+
+  .header : ALIGN(4) {
+    . += 1K;
+    . = ALIGN(CODE_ALIGNMENT);
+  } >FLASH
+
+  .secmon_header : ALIGN(4) {
+    KEEP(*(.secmon_header));
+  } >FLASH
+
+  .padding : ALIGN(4) {
+    _secmon_code_start = .;
+    . = ALIGN(CODE_ALIGNMENT);
+  } >FLASH AT>FLASH
+
+  .flash : ALIGN(CODE_ALIGNMENT) {
+    KEEP(*(.vector_table));
+    . = ALIGN(4);
+  } >FLASH
+
+  .gnu.sgstubs : ALIGN (32) {
+    . = ALIGN(32);
+    KEEP(*(.gnu.sgstubs*));
+    . = ALIGN(32);
+  } >FLASH
+
+  .flash : {
+    *(.text*);
+    . = ALIGN(4);
+    *(.rodata*);
+    . = ALIGN(4);
+  } >FLASH
+
+  /* .data and .bss are intentionally placed before the .stack
+     section to ensure they are located in SRAM2, which is
+     cleared on security events */
+
+  .data : ALIGN(4) {
+    *(.data*);
+    . = ALIGN(4);
+  } >RAM AT>FLASH
+
+  .bss : ALIGN(4) {
+    *(.bss*);
+    . = ALIGN(4);
+  } >RAM
+
+  .stack : ALIGN(8) {
+    . = 80K; /* Overflow causes UsageFault */
+  } >RAM
+
+  .fb1 : ALIGN(4) {
+    *(.fb1*);
+    . = ALIGN(4);
+  } >FB1_RAM
+
+  .fb2 : ALIGN(4) {
+    *(.fb2*);
+    . = ALIGN(4);
+  } >FB2_RAM
+
+  .boot_args : ALIGN(8) {
+    *(.boot_command*);
+    . = ALIGN(8);
+    *(.boot_args*);
+    . = ALIGN(8);
+  } >BOOT_ARGS
+
+  /DISCARD/ : {
+    *(.ARM.exidx*);
+  }
+
+  .flash : {
+    BYTE(0x00)
+    FILL(0x00)
+    . = ALIGN(8K);
+    _secmon_flash_end = .;
+  } >FLASH
+}
diff --git a/core/embed/sys/trustzone/stm32u5/trustzone.c b/core/embed/sys/trustzone/stm32u5/trustzone.c
index ef8ca44d..8964d3ba 100644
--- a/core/embed/sys/trustzone/stm32u5/trustzone.c
+++ b/core/embed/sys/trustzone/stm32u5/trustzone.c
@@ -79,7 +79,7 @@ sram_region_t g_sram_regions[] = {
     {SRAM1_BASE, SRAM1_BASE + SRAM1_SIZE, GTZC_MPCBB1},
     {SRAM2_BASE, SRAM2_BASE + SRAM2_SIZE, GTZC_MPCBB2},
     {SRAM3_BASE, SRAM3_BASE + SRAM3_SIZE, GTZC_MPCBB3},
-#if defined STM32U5A9xx | defined STM32U5G9xx
+#if defined STM32U5A9xx | defined STM32U5G9xx | defined STM32U5A5xx
     {SRAM5_BASE, SRAM5_BASE + SRAM5_SIZE, GTZC_MPCBB5},
 #endif
 #if defined STM32U5G9xx
@@ -179,6 +179,8 @@ typedef struct {
 #define XFLASH_BANK_SIZE 0x200000
 #elif defined STM32U5G9xx
 #define XFLASH_BANK_SIZE 0x200000
+#elif defined STM32U5A5xx
+#define XFLASH_BANK_SIZE 0x200000
 #elif defined STM32U585xx
 #define XFLASH_BANK_SIZE 0x100000
 #else
diff --git a/core/embed/upymod/Cargo.toml b/core/embed/upymod/Cargo.toml
index b97992e1..e4640162 100644
--- a/core/embed/upymod/Cargo.toml
+++ b/core/embed/upymod/Cargo.toml
@@ -24,6 +24,7 @@ mcu_stm32f427 = ["io/mcu_stm32f427", "mcu_stm32f4"]
 mcu_stm32f429 = ["io/mcu_stm32f429", "mcu_stm32f4"]
 mcu_stm32u58 = ["io/mcu_stm32u58", "mcu_stm32u5"]
 mcu_stm32u5g = ["io/mcu_stm32u5g", "mcu_stm32u5"]
+mcu_stm32u5a = ["io/mcu_stm32u5a", "mcu_stm32u5"]
 
 # --------------------------------------------------------------------------
 # Selectable components
diff --git a/core/embed/xbuild/src/trezor.rs b/core/embed/xbuild/src/trezor.rs
index 7327dafb..8c9e251e 100644
--- a/core/embed/xbuild/src/trezor.rs
+++ b/core/embed/xbuild/src/trezor.rs
@@ -225,6 +225,8 @@ impl CLibrary {
             // final binary according to the selected binary type.
             let target_ld = if has_feature("mcu_stm32u5g") {
                 format!("sys/linker/stm32u5g/{binary_type}.ld")
+            } else if has_feature("mcu_stm32u5a") {
+                format!("sys/linker/stm32u5a/{binary_type}.ld")
             } else if has_feature("mcu_stm32u58") {
                 format!("sys/linker/stm32u58/{binary_type}.ld")
             } else if has_feature("mcu_stm32f4") {
diff --git a/core/embed/xtask/src/config.rs b/core/embed/xtask/src/config.rs
index cd46ffb8..a9def6c6 100644
--- a/core/embed/xtask/src/config.rs
+++ b/core/embed/xtask/src/config.rs
@@ -48,7 +48,7 @@ impl ModelConfig {
     pub fn target_triple(&self) -> Result<&'static str> {
         match self.mcu.as_str() {
             "stm32f427" | "stm32f429" => Ok("thumbv7em-none-eabihf"),
-            "stm32u58" | "stm32u5g" => Ok("thumbv8m.main-none-eabihf"),
+            "stm32u58" | "stm32u5g" | "stm32u5a" => Ok("thumbv8m.main-none-eabihf"),
             mcu => Err(anyhow!("Unknown MCU: {mcu}")),
         }
     }
@@ -56,7 +56,7 @@ impl ModelConfig {
     pub fn openocd_target(&self) -> Result<&'static str> {
         match self.mcu.as_str() {
             "stm32f427" | "stm32f429" => Ok("target/stm32f4x.cfg"),
-            "stm32u58" | "stm32u5g" => Ok("target/stm32u5x.cfg"),
+            "stm32u58" | "stm32u5g" | "stm32u5a" => Ok("target/stm32u5x.cfg"),
             mcu => Err(anyhow!("Unknown MCU: {mcu}")),
         }
     }