CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Document Number: 001-12559 Rev. *D Page 17 of 26
Identification Register Definitions Instruction Field Value Description
CY7C1516JV18 CY7C1527JV18 CY7C1518JV18 CY7C1520JV18
Revision Number
(31:29) 000 000 000 000 Version number.
Cypress Device ID
(28:12) 11010100010000100 11010100010001100 11010100010010100 11010100010100100 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 109
Instruction CodesInstruction 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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