MT57V256H36P Micron Semiconductor Products, Inc., MT57V256H36P Datasheet - Page 20

• Manufacturer Part Number: MT57V256H36P
• Description: 9Mb DDR SRAM 2.5V Vdd, HSTL Pipelined
• Manufacturer: Micron Semiconductor Products, Inc.

IDENTIFICATION REGISTER DEFINITIONS
SCAN REGISTER SIZES
INSTRUCTION CODES
256K x 36 2.5V V
MT57V256H36P_5.p65 – Rev. 5, Pub. 5/02
INSTRUCTION FIELD
REVISION NUMBER
(31:29)
DEVICE ID
(28:12)
DEVICE WIDTH
(22:18)
MICRON DEVICE ID
(17:12)
MICRON JEDEC ID
CODE (11:1)
ID Register Presence
Indicator (0)
REGISTER NAME
Instruction
Bypass
ID
Boundary Scan
INSTRUCTION
EXTEST
IDCODE
SAMPLE Z
RESERVED
SAMPLE/PRELOAD
RESERVED
RESERVED
BYPASS
DD
, HSTL, Pipelined DDR SRAM
CODE
BIT SIZE (x36)
00010100011000000 Defines 256K x 36 DDR 4-word burst.
000
001
010
011
100
101
110
111
00000101100
256K x 36
32
69
3
1
xxxxxx
00100
000
DESCRIPTION
Captures I/O ring contents. Places the boundary scan register between TDI and
TDO. This instruction is not 1149.1-compliant. This operation does not affect
SRAM operations.
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.
Do Not Use: This instruction is reserved for future use.
Captures I/O ring contents. Places the boundary scan register between TDI and
TDO. This instruction does not implement 1149.1 preload function and is
therefore not 1149.1-compliant.
Do Not Use: This instruction is reserved for future use.
Do Not Use: This instruction is reserved for future use.
Places the bypass register between TDI and TDO. This operation does not affect
SRAM operations.
1
Reserved for version number.
Defines width of x36 bits.
Reserved for future use.
Allows unique identification of SRAM vendor.
Indicates the presence of an ID register.
DESCRIPTION
2.5V V
20
DD
Micron Technology, Inc., reserves the right to change products or specifications without notice.
, HSTL, PIPELINED DDR SRAM
256K x 36
©2002, Micron Technology, Inc.