beautypg.com

Identification register, Identification – Cypress CY7C1387F User Manual

Page 15

background image

CY7C1386D, CY7C1386F

CY7C1387D, CY7C1387F

Document Number: 38-05545 Rev. *E

Page 15 of 30

Identification Register Definitions

Instruction Field

CY7C1386D/CY7C1386F

(512K × 36)

CY7C1387D/CY7C1387F

(1M × 18)

Description

Revision Number (31:29)

000

000

Describes the version number

Device Depth (28:24)

[13]

01011

01011

Reserved for internal use.

Device Width (23:18) 119-BGA

101110

101110

Defines the memory type and

architecture.

Device Width (23:18) 165-FBGA

000110

000110

Defines the memory type and

architecture.

Cypress Device ID (17:12)

100101

010101

Defines the width and density.

Cypress JEDEC ID Code (11:1)

00000110100

00000110100

Allows unique identification of SRAM

vendor.

ID Register Presence Indicator (0)

1

1

Indicates the presence of an ID

register.

Scan Register Sizes

Register Name

Bit Size (x18)

Bit Size (x36)

Instruction

3

3

Bypass

1

1

ID

32

32

Boundary Scan Order (119-ball BGA package)

85

85

Boundary Scan Order (165-ball FBGA package)

89

89

Identification Codes

Instruction

Code

Description

EXTEST

000

Captures IO ring contents. Places the boundary scan register between TDI and TDO.

Forces all SRAM outputs to High-Z state.

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 operations.

SAMPLE Z

010

Captures IO ring 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/PRELOA

D

100

Captures IO ring contents. Places the boundary scan register between TDI and TDO.

Does not affect 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

operations.

Note

13. Bit #24 is 1 in the register definitions for both 2.5V and 3.3V versions of this device.

[+] Feedback

This manual is related to the following products: