CY7C1471V33
CY7C1473V33
CY7C1475V33
Document #: 38-05288 Rev. *J Page 18 of 32
Identification Register Definitions
Instruction Field CY7C1471V33
(2Mx36)
CY7C1473V33
(4Mx18)
CY7C1475V33
(1Mx72) Description
Revision Number (31:29) 000 000 000 Describes the version number
Device Depth (28:24)[13] 01011 01011 01011 Reserved for internal use
Architecture/Memory
Type(23:18)
001001 001001 001001 Defines memory type and architecture
Bus Width/Density(17:12) 100100 010100 110100 Defines width and density
Cypress JEDEC ID Code (11:1) 00000110100 00000110100 00000110100 Enables unique identification of SRAM
vendor
ID Register Presence Indicator (0) 1 1 1 Indicates the presence of an ID
register
Scan Register Sizes
Register Name Bit Size (x36) Bit Size (x18) Bit Size (x72)
Instruction 3 3 3
Bypass 1 1 1
ID 32 32 32
Boundary Scan Order – 165FBGA 71 52 -
Boundary Scan Order – 209BGA - - 110
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. 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 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/PRELOAD 100 Captures IO 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.
Note
13.Bit #24 is “1” in the ID Register Definitions for both 2.5V and 3.3V versions of this device.
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