diff --git a/ports/stm32/boards/PYBD_SF2/board_init.c b/ports/stm32/boards/PYBD_SF2/board_init.c
index 3dc2c85e22..8438b82317 100644
--- a/ports/stm32/boards/PYBD_SF2/board_init.c
+++ b/ports/stm32/boards/PYBD_SF2/board_init.c
@@ -36,3 +36,8 @@ void board_early_init(void) {
     // Explicitly init SPI2 because it's not enabled as a block device
     spi_bdev_ioctl(&spi_bdev2, BDEV_IOCTL_INIT, (uint32_t)&spiflash2_config);
 }
+
+void board_sleep(int value) {
+    mp_spiflash_deepsleep(&spi_bdev.spiflash, value);
+    mp_spiflash_deepsleep(&spi_bdev2.spiflash, value);
+}
diff --git a/ports/stm32/boards/PYBD_SF2/mpconfigboard.h b/ports/stm32/boards/PYBD_SF2/mpconfigboard.h
index 56650ba158..a46b5ca5bc 100644
--- a/ports/stm32/boards/PYBD_SF2/mpconfigboard.h
+++ b/ports/stm32/boards/PYBD_SF2/mpconfigboard.h
@@ -41,7 +41,11 @@
 #define MICROPY_HW_ENABLE_MMCARD    (1)
 
 #define MICROPY_BOARD_EARLY_INIT    board_early_init
+#define MICROPY_BOARD_ENTER_STOP    board_sleep(1);
+#define MICROPY_BOARD_LEAVE_STOP    board_sleep(0);
+#define MICROPY_BOARD_ENTER_STANDBY board_sleep(1);
 void board_early_init(void);
+void board_sleep(int value);
 
 // HSE is 25MHz, run SYS at 120MHz
 #define MICROPY_HW_CLK_PLLM         (20)