Cypress manual SROM Table Read Description, CY7C601xx, CY7C602xx, Page 19 of

CY7C601xx, CY7C602xx

11.6 SROM Table Read Description

The Silicon IDs for enCoRe II LV devices are stored in SROM tables in the part, as shown in Figure 11-3.on page 20

The Silicon ID can be read out from the part using SROM Table reads. This is demonstrated in the following pseudo code. As mentioned in the section SROM on page 15, the SROM variables occupy address F8h through FFh in the SRAM. Each of the variables and their definition are given in the section SROM on page 15.

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, 2
mov
mov	[SSC_BLOCKID], A// To read from Table 2 - trim values for the IMO are stored in table 2
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 11-1		; SSC call the supervisory ROM
SSC

// 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 38-16016 Rev. *E Page 19 of 68

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