SPC7281 Epson Electronics America, Inc., SPC7281 Datasheet - Page 92

• Manufacturer Part Number: SPC7281
• Description: IEEE1394 Controller
• Manufacturer: Epson Electronics America, Inc.

S1R72801F00A
8.2 FLASH ROM CONTROL REGISTER
Flash Control Register
Bit7 FlashCtlEnb
Bit6 Reserved
Bit5 Reserved
Bit4 Erase
Bit3 FlashStat
Bit2 FlashChipErs
Bit1 FlashSctErs
Bit1 FlashWREnb
88
0x200000 FlashCtl
Address Register Name
This register controls the erase and write of the built-in Flash.
Enables Flash control.
Setting this bit to “1” enables the lower order 5 bits of this register. Setting “0” disables having access to the
built-in Flash.
Setting this bit to “1” starts to erase the built-in Flash. This bit is read-only. If you read it, it always indicates
zero.
Setting this bit to “1” at the time of FlashSctErs=1, the Flash Address is updated after erasing one sector.
Indicates the operation of Write/Erase.
“1”: In execution
“0”: Processing finishes.
Use this bit to erase all the built-in Flash.
“1”: All Erase is enabled..
“0”: All Erase is disabled.
Use this bit to erase the built-in Flash in the unit of sector. It enables the erase of the sector address set on the
Flash Address.
“1”: Sector Erase is enabled..
“0”: Sector Erase is disabled.
Enables Data Write into the built-in Flash.
“1”: Data Write is enabled..
“0”: Data Write is disabled.
Sequence to set a default value on FlashCtlCnt_reg
Turn on one of Bit0, Bit1 or Bit2 to select a desired operation.
Next, turn on bit7.
Sequence to set a value on FlashCtlCnt_reg
Turn on Bit7 and one of Bit0, Bit1 and Bit2.
Next, set a value on the FlashCtlCnt_reg.
7: FlashCtlEnb
6:
5:
4: Erase
3: FlashStat
2: FlashChipErs R/W 0: Chip All Erase Disable
1: FlashSctErs
0: FlashWrEnb
Bit Symbol
R/W
R/W 0: Flash Control Disable
R/W 0: Sector Erase Disable
R/W 0: Flash Data Write Disable 1: Flash Data Write Enable
W
R
0:
0:
0: None
0: Write/Erase Complete
EPSON
Description
1: Flash Control Enable
1:
1:
1: Erase Execute
1: Write/Erase Run
1: Chip All Erase Enable
1: Sector Erase Enable
H.Rst S.Rst B.Rst
0x00
0x00
–