SN32F280 Series
32-Bit Cortex-M0 Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 251
Version 1.1
6
START
Start Erase/Program operation
1: Triggers an Erase/Program operation when set. This bit is set only by
SW and resets when the BUSY bit resets.
0: Erase process is done.
R/W
0
5:2
Reserved
R
0
2
MER
Mass erase chosen mode bit
Erase of all user pages chosen.
This bit is set only by SW and reset when the BUSY bit resets.
R/W
0
1
PER
Page Erase chosen.
This bit is set only by SW and reset when the BUSY bit resets.
R/W
0
0
PG
Flash Programming chosen.
This bit is set only by SW and reset when the BUSY bit resets.
R/W
0
21.11.4 Flash Data register (FLASH_DATA)
Address offset: 0x0C
For Page Program operations, this should be updated by SW to indicate the data to be programmed.
Bit
Name
Description
Attribute
Reset
31:0
DATA[31:0]
Data to be programmed.
R/W
0
21.11.5 Flash Address register (FLASH_ADDR)
Address offset: 0x10
The Flash address to be erased or programmed should be updated by SW, and the PG bit or PER bit shall be set before
filling in the Flash address.
Note: Write access to this register is blocked when the BUSY bit in the FLASH_STATUS
register is set.
Bit
Name
Description
Attribute
Reset
31:0
FAR[31:0]
Flash Address
Choose the Flash address to erase when Page Erase is selected, or to
program when Page Program is selected.
R/W
0
21.11.6 Flash Checksum register (FLASH_CHKSUM)
Address offset: 0x14
Bit
Name
Description
Attribute
Reset
31:16
BRCHKSUM[15:0] Checksum of Boot ROM.
R
0
15:0
URCHKSUM[15:0] Checksum of User ROM.
R
0
21.11.7 Flash Checksum register 1 (FLASH_CHKSUM1)
Address offset: 0x18
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