89HPEB383 Datasheet, PDF (118/264 Pages) Integrated Device Technology – Topics discussed include the following

104
12. Serial EEPROM > EEPROM Image
12.3
EEPROM Image
The data structure to be maintained in the external EEPROM for successful operation of the EEPROM
Controller is shown in Table 31. Note that the m and n in the Description column indicate the register
number: they can point to any register in the entire CSR space.
The byte enable[3:0] is active high; a 1 enables the byte. For example, a byte enable of 0b0001 would
enable the low order byte, bits[7:0] of the DWORD.
Table 31: EEPROM Image
Serial EEPROM
Location
0000h
0001h
0002h
0003h
0004h
0005h
0006h
0007h
0008h
0009h
000Ah
000Bh
000Ch
000Dh
000Eh
000Fh
...
FFFAh
FFFBh
FFFCh
FFFDh
Description
Value
Identification code [7:0]
0xAB
Identification code [15:8]
0x28
Byte count [7:0]
Any value
Byte count [15:8]
Any value, but total value of
Byte count[15:0] should be
multiple of 6
CSR register m Address [7:0]
Any number
CSR register m byte enable [3:0], CSR register m Address [11:8] Any number
CSR register m Data [7:0]
Any number
CSR register m Data [15:8]
Any number
CSR register m Data [23:16]
Any number
CSR register m Data [31:24]
Any number
CSR register n Address [7:0]
Any number
CSR register n byte enable [3:0], CSR register n Address [11:8] Any number
CSR register n Data [7:0]
Any number
CSR register n Data [15:8]
Any number
CSR register n Data [23:16]
Any number
CSR register n Data [31:24]
Any number
...
...
CSR register r Address [7:0]
Any number
CSR register r byte enable [3:0], CSR register r Address [11:8]
Any number
CSR register r Data [7:0]
Any number
CSR register r Data [15:8]
Any number
PEB383 User Manual
July 25, 2011
Integrated Device Technology, Inc.
Confidential - NDA Required