AS7C332MNTD18A
®
Scan register sizes
Register name
Instruction
Bypass
Bit size
3
1
ID
32
Boundary scan
x18:76
Instruction codes
Instruction
Code
Description
Captures I/O 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.
EXTEST
IDCODE
000
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.
Captures I/O ring contents. Places the boundary scan register between TDI and TDO. Forces all
SRAM output drivers to a high-Z state.
SAMPLE Z
RESERVED
010
101
100
Do not use. This instruction is reserved for future use.
SAMPLE/
PRELOAD
Captures I/O ring contents. Places the boundary scan register between TDI and TDO.
Places the bypass register between TDI and TDO. This operation does not affect SRAM
operations.
BYPASS
111, 011, 110
4/26/04, V 1.2
Alliance Semiconductor
P. 15 of 22
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
