Cypress CY7C1380C - Manual (Page 19)

CY7C1380C
CY7C1382C
Document #: 38-05237 Rev. *D Page 19 of 36
Identification Register Definitions
INSTRUCTION FIELD
CY7C1380C
(512KX36)
CY7C1382C
(1MX18)
DESCRIPTION
Revision Number (31:29) 010 0100 Describes the version number.
Device Depth (28:24) 01010 1010 Reserved for Internal Use
Device Width (23:18) 000000 000000 Defines memory type and architecture
Cypress Device ID (17:12) 100101 010101 Defines 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(X36) BIT SIZE(X18)
Instruction 3 3
Bypass 1 1
ID 32 32
Boundary Scan Order 72 72
Identification Codes
INSTRUCTION CODE DESCRIPTION
EXTEST 000 Captures I/O ring contents. Places the boundary scan register between TDI and TDO.
Forces all SRAM outputs to High-Z state. This instruction is not 1149.1 compliant.
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 I/O 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/PRELOAD 100 Captures I/O ring contents. Places the boundary scan register between TDI and TDO.
Does not affect SRAM operation. This instruction does not implement 1149.1 preload
function and is therefore not 1149.1 compliant.
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.
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