Cypress CY7C0837AV, CY7C0830AV CY7C0831AV, CY7C0832AV CY7C0832BV, CY7C0833AV, Instruction

CY7C0837AV, CY7C0830AV

CY7C0831AV, CY7C0832AV

CY7C0832BV, CY7C0833AV

	Figure 5. Scan Chain for 9 Mb Device
		TDO
		TDO
		D2
		TDI
		TDO
		D1
		TDI
		TDI
Table 4. Identification Register Definitions
Instruction Field	Value	Description

Revision Number (31:28)	0h	Reserved for version number.
Cypress Device ID (27:12)	C090h	Defines Cypress part number for CY7C0832AV/CY7C0832BV
	C091h	Defines Cypress part number for CY7C0831AV
	C093h	Defines Cypress part number for CY7C0830AV
	C094h	Defines Cypress part number for CY7C0837AV.
Cypress JEDEC ID (11:1)	034h	Allows unique identification of the DP family device vendor.
ID Register Presence (0)	1	Indicates the presence of an ID register.

Table 5. Scan Registers Sizes

	Register Name		Bit Size
	Instruction		4
	Bypass		1
	Identification		32
	Boundary Scan		n[22]
Table 6. Instruction Identification Codes
Instruction	Code		Description
EXTEST	0000	Captures the Input/Output ring contents. Places the BSR between the TDI and TDO.
BYPASS	1111	Places the BYR between TDI and TDO.
IDCODE	1011	Loads the IDR with the vendor ID code and places the register between TDI and TDO.
HIGHZ	0111	Places BYR between TDI and TDO. Forces all device output drivers to a High-Z state.
CLAMP	0100	Controls boundary to 1/0. Places BYR between TDI and TDO.
SAMPLE/PRELOAD	1000	Captures the input/output ring contents. Places BSR between TDI and TDO.
NBSRST	1100	Resets the non-boundary scan logic. Places BYR between TDI and TDO.
RESERVED	All other codes	Other combinations are reserved. Do not use other than the above.

Note

22. See details in the device BSDL file.

Document #: 38-06059 Rev. *S Page 11 of 28

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