Cypress CY7C63310, CY7C638xx manual Srom Table

CY7C63310, CY7C638xx

Figure 9-3. SROM Table

	F8h	F9h	FAh	FBh	FCh	FDh	FEh	FFh
Table0	Silicon ID	Silicon ID
	[15-8]	[7-0]
Table1	Family/	Revision
	Die ID	ID
Table2
Table3
Table4
Table5
Table6
Table7

The Silicon IDs for enCoRe II devices are stored in SROM tables in the part, as shown in Figure 9-3.

The Silicon ID can be read out from the part using SROM Table reads (Table 0). This is demonstrated in the following pseudo code. As mentioned in the section SROM on page 14, the SROM variables occupy address F8h through FFh in the SRAM. Each of the variables and their definition is given in the section SROM on page 14.

AREA SSCParmBlkA(RAM,ABS)

org F8h // Variables		are defined starting at address F8h
SSC_KEY1:	blk 1	; F8h	supervisory	key
SSC_RETURNCODE:		; F8h	result code
SSC_KEY2 :	blk 1	;F9h	supervisory stack ptr key
SSC_BLOCKID:	blk 1	; FAh	block ID
SSC_POINTER:	blk 1	; FBh	pointer to data buffer
SSC_CLOCK:	blk 1	; FCh	Clock
SSC_MODE:	blk 1	; FDh	ClockW ClockE multiplier
SSC_DELAY:	blk 1	; FEh	flash macro sequence delay count
SSC_WRITE_ResultCode: blk		1 ; FFh	temporary result code

_main:	A, 0
mov
mov	[SSC_BLOCKID], A// To read from Table 0 - Silicon ID is stored in Table 0
//Call SROM operation to read the SROM table
mov	X, SP	; copy SP into X
mov	A, X	; A temp stored in X
add	A, 3		; create 3 byte stack frame (2 + pushed A)
mov	[SSC_KEY2], A		; save stack frame for supervisory code
; load the supervisory code for flash operations
mov	[SSC_KEY1], 3Ah		;FLASH_OPER_KEY - 3Ah
mov	A,6	; load A with specific operation. 06h is the code for Table read Table 9-1
SSC		; SSC call the supervisory ROM

// At the end of the SSC command the silicon ID is stored in F8 (MSB) and F9(LSB) of the SRAM

.terminate:

jmp .terminate

Document 38-08035 Rev. *K Page 18 of 83

[+] Feedback