11. Repeat 2 to 8 until all pages are erased
Flash bulk erase mode
1. Enable program mode.
2. Reset page buffer. FEMR: 1000_0001 FECR:0000_0010
3. Select page buffer. FEMR:1000_1001
4. Write ‘h00 to page buffer. (Data value is not important.)
5. Set erase mode. FEMR:1001_0001.
Only main cell area is erased.
For bulk erase including OTP area, select OTP area (set FEMR to 1000_1101).
6. Set FETCR
7. Start bulk erase. FECR:1000_1011
8. Insert one NOP operation
9. Read FESR until PEVBSY is 1.
Flash OTP area read mode
1. Enter OCD (=ISP) mode.
2. Set ENBDM bit of BCR.
3. Enable debug and Request debug mode.
4. Select OTP area. FEMR:1000_0101
5. Read data from Flash.
Flash OTP area write mode
1. Enable program mode.
2. Reset page buffer. FEMR: 1000_0001 FECR:0000_0010
3. Select page buffer. FEMR:1000_1001
4. Write data to page buffer (Address automatically increases by twin).
5. Set write mode and select OTP area. FEMR:1010_0101
6. Set page address. FEARH:FEARM:FEARL=20’hx_xxxx
7. Set FETCR.
To Next Page
Loading...