CYWUSB6953_10 datasheet(25/68 Pages) CYPRESS

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CYRF69103

Document #: 001-07611 Rev *F

Page 25 of 68

Trim values for the IOSCTR register:

The trim values are stored in SROM tables in the part as shown in Figure 15-1. on page 24.

The trim values are read out from the part based on voltage settings and written to the IOSCTR register at location 0x34. The following

pseudo code shows how this is done.

_main:

mov

A, 2

mov

[SSC_BLOCKID], A

Call SROM operation to read the SROM table (Refer to section SROM Table Read Description)

//After this command is executed, the trim values for 3.3, 3.0, 2.85 and 2.7 are stored at locations

FC through FF in the RAM. SROM calls are explained in the previous section of this datasheet

;

mov

A, [FCh]

// trim values for 3.3V

mov

A, [FDh]

// trim values for 3.0V

;

mov

A, [FEh]

// trim values for 2.85V

;

mov

A, [FFh]

// trim values for 2.70V

mov

reg[IOSCTR],A // Loading IOSCTR with trim values for 3.0V

.terminate:

jmp .terminate

15.1 SROM Table Read Description

The Silicon IDs for CYRF69103 devices are stored in SROM tables in the part, as shown in Figure 15-1. on page 24.

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 20, the SROM variables occupy address F8h through FFh in the SRAM. Each of the

variables and their definition in given in the section “SROM” on page 20.

AREA SSCParmBlkA(RAM,ABS)

org

F8h // Variables are defined starting at address F8h

SSC_KEY1:

; F8h

supervisory key

SSC_RETURNCODE:

blk 1 ; 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:

mov

A, 0

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

14-1 on page 20

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

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