beautypg.com

Cypress CY7C1303BV25 User Manual

Page 13

background image

CY7C1306BV25

CY7C1303BV25

Document #: 38-05627 Rev. *A

Page 13 of 19

Scan Register Sizes

Register Name

Bit Size

Instruction

3

Bypass

1

ID

32

Boundary Scan

107

Instruction Codes

Instruction

Code

Description

EXTEST

000

Captures the Input/Output ring contents.

IDCODE

001

Loads the ID register with the vendor ID code and places the register
between TDI and TDO. This operation does not affect SRAM operation.

SAMPLE Z

010

Captures the Input/Output contents. Places the boundary scan register
between TDI and TDO. Forces all SRAM output drivers to a High-Z state.

RESERVED

011

Do Not Use: This instruction is reserved for future use.

SAMPLE/PRELOAD

100

Captures the Input/Output ring contents. Places the boundary scan register
between TDI and TDO. Does not affect the SRAM operation.

RESERVED

101

Do Not Use: This instruction is reserved for future use.

RESERVED

110

Do Not Use: This instruction is reserved for future use.

BYPASS

111

Places the bypass register between TDI and TDO. This operation does not
affect SRAM operation.

[+] Feedback

This manual is related to the following products: