CY7C0837AV
CY7C0830AV/CY7C0831AV
CY7C0832AV/CY7C0833AV
Document #: 38-06059 Rev. *Q
Page 11 of 28
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
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[21]
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.
Notes:
21. See details in the device BSDL file.
D2
TDO
TDI
D1
TDO
TDI
TDI
TDO
Figure 3. Scan Chain for 9Mb Device
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