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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