CY7C1561V18, CY7C1576V18
CY7C1563V18, CY7C1565V18
Identification Register Definitions
Instruction Field |
| Value |
| Description | ||
CY7C1561V18 | CY7C1576V18 | CY7C1563V18 | CY7C1565V18 | |||
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Revision Number | 000 | 000 | 000 | 000 | Version number. | |
(31:29) |
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Cypress Device ID | 11010010001000100 | 11010010001001100 | 11010010001010100 | 11010010001100100 | Defines the type of | |
(28:12) |
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| SRAM. | |
Cypress JEDEC ID | 00000110100 | 00000110100 | 00000110100 | 00000110100 | Allows unique | |
(11:1) |
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| identification of | |
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| SRAM vendor. | |
ID Register | 1 | 1 | 1 | 1 | Indicates the | |
Presence (0) |
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| presence of an ID | |
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| register. |
Scan Register Sizes
Register Name | Bit Size |
Instruction | 3 |
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Bypass | 1 |
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ID | 32 |
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Boundary Scan | 109 |
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Instruction Codes
Instruction | Code | Description |
EXTEST | 000 | Captures the input and output ring contents. |
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IDCODE | 001 | Loads the ID register with the vendor ID code and places the register between TDI and TDO. |
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| This operation does not affect SRAM operation. |
SAMPLE Z | 010 | Captures the input and output contents. Places the boundary scan register between TDI and |
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| TDO. Forces all SRAM output drivers to a |
RESERVED | 011 | Do Not Use: This instruction is reserved for future use. |
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SAMPLE/PRELOAD | 100 | Captures the input and output ring contents. Places the boundary scan register between TDI |
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| and TDO. Does not affect the SRAM operation. |
RESERVED | 101 | Do Not Use: This instruction is reserved for future use. |
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RESERVED | 110 | Do Not Use: This instruction is reserved for future use. |
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BYPASS | 111 | Places the bypass register between TDI and TDO. This operation does not affect SRAM |
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| operation. |
Document Number: | Page 17 of 28 |
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