Broadcom BCM5722 - Table 401: NVM Config 2 Register (Offset 0 X7018)

BCM5722 Programmer’s Guide
10/15/07
Broadcom Corporation
Page 373 Non-Volatile Memory Interface Registers Document 5722-PG101-R
NVM CONFIG 2 REGISTER (OFFSET 0X7018)
6:4 Status Bits This field represents the bit offset in the status command
response to interpret as the ready flag.
• 0 if flash_mode =
1
• 7 if buffer_mode
= 1
• X otherwise
R/W
3 BitBang_Mode Enable bit-bang mode to control pins. 0 R/W
2 Pass Mode Enables pass-through mode to the byte level SPI and SEE state
machines.
0R/W
1 buffer_mode Enable SSRAM Buffered Interface mode. pin R/W
0 flash_mode Enable Flash Interface mode. pin R/W
Table 401: NVM Config 2 Register (Offset 0x7018)
Bit Field Description Init Access
31:24 Reserved – 0 RO
23:16 Status Command This command is used to poll the ready status of the
flash device after a command.
• 0x9f if flash_mode = 1
• 0x57 if buffer_mode = 1
• 0x5f if protect_mode = 1
R/W
15:8 Dummy Value for dummy bytes added to commands. X R/W
7:0 Erase Command Flash device erase command. The ready status is
polled after this command.
• 0x20 if flash_mode = 1
• 0x81 if buffer_mode = 1
• 0xd8h if protect_mode = 1
R/W
Table 400: NVM Config 1 Register (Offset 0x7014) (Cont.)
Bit Field Description Init Access