Filter
Top Products
CY7C1471BV25
CY7C1473BV25, CY7C1475BV25
Document #: 001-15013 Rev. *E Page 17 of 30
Table 8. Identification Register Definitions
Instruction Field
CY7C1471BV25
(2MX36)
CY7C1473BV25
(4MX18)
CY7C1475BV25
(1MX72)
Description
Revision Number (31:29) 000 000 000 Describes the version number
Device Depth (28:24) 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 Allows unique identification of SRAM
vendor
ID Register Presence Indicator (0) 1 1 1 Indicates the presence of an ID register
Table 9. 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
Table 10. 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 operation.
[+] Feedback