Cypress CY7C1470BV33, CY7C1474BV33, CY7C1472BV33 manual Scan Register Sizes Register Name Bit Size

CY7C1470BV33

CY7C1472BV33, CY7C1474BV33

Table 6. Identification Register Definitions

Instruction Field	CY7C1470BV33	CY7C1472BV33	CY7C1474BV33	Description
	(2M x 36)	(4M x 18)	(1M x 72)
Revision Number (31:29)	000	000	000	Describes the version number
Device Depth (28:24)[12]	01011	01011	01011	Reserved for internal use
Architecture/Memory	001000	001000	001000	Defines memory type and archi-
Type(23:18)				tecture
Bus Width/Density(17:12)	100100	010100	110100	Defines width and density
Cypress JEDEC ID Code	00000110100	00000110100	00000110100	Enables unique identification of
(11:1)				SRAM vendor
ID Register Presence	1	1	1	Indicates the presence of an ID
Indicator (0)				register

Table 7. 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 – 165 FBGA		71		52	-
Boundary Scan Order – 209 FBGA		-		-	110
Table 8. 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.

Note

12. Bit #24 is “1” in the ID Register Definitions for both 2.5V and 3.3V versions of this device.

Document #: 001-15031 Rev. *C Page 17 of 30

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