IS66/67WVR4M8ALL/BLL

Integrated Silicon Solution, Inc.- www.issi.com

24

Rev. A2

07/08/2024

6.

REGISTER

The device has 8-bit Configuration Register and 64 bit ID Register.

6.1 DEVICE IDENTIFICATION REGISTER

It is a read only, non-volatile, word register that provides device information. The device information fields

can be identified as below.

a.

Manufacturer

b.

KGD Test

i. Not Passed Yet (55h)

ii. Passed (5Dh)

c.

Density

Table 6.2 ID Register

Bits

Function

Value

63 - 56

Manufacturer

1001 1101 (9Dh) = ISSI

55 - 48

KGD Test

0101 0101 (55h) = Not Passed Yet.

0101 1101 (5Dh) = PASS

Default value on this register is (0x55 = Not Passed Yet). After the all

tests passed, then programmed as 0x5D (Pass) in manufacturing

process.

47 - 45

Device Density

000 = 8Mb

001 = 16Mb

010 = 32Mb

011~111 = Reserved.

44 - 0

Reserved

Reserved