esp32-s2自带4Mflash启动时校验镜像失败怎么解决？

ESP-ROM:esp32s2-rc4-20191025

Build:Oct 25 2019

rst:0x3 (RTC_SW_SYS_RST),boot:0x1f (SPI_FAST_FLASH_BOOT)

Saved PC:0x40051236

SPIWP:0xee

mode:DIO, clock div:1

load:0x3ffe6100,len:0x16dc

load:0x4004c000,len:0xa8c

load:0x40050000,len:0x2afc

entry 0x4004c218

I (24) boot: ESP-IDF v4.4-dev-2184-g166c30e7b2-dirty 2nd stage bootloader

I (24) boot: compile time 08:32:45

I (25) boot: chip revision: 0

I (29) boot.esp32s2: SPI Speed      : 80MHz

I (33) boot.esp32s2: SPI Mode       : DIO

I (38) boot.esp32s2: SPI Flash Size : 4MB

I (43) boot: Enabling RNG early entropy source...

I (48) boot: Partition Table:

I (52) boot: ## Label            Usage          Type ST Offset   Length

I (59) boot:  0 nvs              WiFi data        01 02 00009000 00006000

I (66) boot:  1 phy_init         RF data          01 01 0000f000 00001000

I (74) boot:  2 factory          factory app      00 00 00010000 00100000

I (81) boot: End of partition table

I (86) esp_image: segment 0: paddr=00010020 vaddr=3f000020 size=19404h (103428) map

I (115) esp_image: segment 1: paddr=0002942c vaddr=3ffcc060 size=031fch ( 12796) load

I (118) esp_image: segment 2: paddr=0002c630 vaddr=40024000 size=039e8h ( 14824) load

I (124) esp_image: segment 3: paddr=00030020 vaddr=40080020 size=7a5b4h (501172) map

E (250) esp_image: Checksum failed. Calculated 0x5 read 0x56

E (253) boot: Factory app partition is not bootable

E (259) boot: No bootable app partitions in the partition table



有人遇到这种情况么？一般时什么原因导致的？