Cypress CY7C1317CV18, CY7C1319CV18, CY7C1321CV18, CY7C1917CV18 CY7C1317CV18, CY7C1917CV18 CY7C1319CV18, CY7C1321CV18

CY7C1317CV18, CY7C1917CV18
CY7C1319CV18, CY7C1321CV18
Document Number: 001-07161 Rev. *D Page 18 of 31
Identification Register Definitions
Instruction Field Value Description
CY7C1317CV18 CY7C1917CV18 CY7C1319CV18 CY7C1321CV18
Revision Number
(31:29) 000 000 000 000 Version number.
Cypress Device ID
(28:12) 11010100011000101 11010100011001101 11010100011010101 11010100011100101 Defines the typ e of SRAM.
Cypress JEDEC ID
(11:1) 00000110100 00000110100 00000110100 00000110100 Allows unique identification of
SRAM vendor.
ID Register
Presence (0) 1111Indicates the presence of an ID
register.
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 and 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 and 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 and 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.
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