MT57V256H36E Micron Semiconductor Products, Inc., MT57V256H36E Datasheet - Page 18

• Manufacturer Part Number: MT57V256H36E
• Description: 9Mb DDR SRAM 2.5V Vdd, HSTL Pipelined
• Manufacturer: Micron Semiconductor Products, Inc.

Table 14: Identification Register Definitions
Table 15: Scan Register Size
Table 16: Instruction Codes
256K x 36 2.5V V
MT57V256H36E_16_B.fm - Rev. B, Pub. 1/03
INSTRUCTION FIELD
REGISTER NAME
INSTRUCTION
REVISION NUMBER
(31:29)
DEVICE ID
(28:12)
DEVICE WIDTH
(22.18)
MICRON JEDEC ID
(17.12)
MICRON JEDEC ID
CODE (11:1)
ID Register Presence
Indicator 0)
Instruction
Bypass
ID
Boundary Scan
EXTEST
IDCODE
SAMPLE Z
RESERVED
SAMPLE/
PRELOAD
RESERVED
RESERVED
BYPASS
DD
, HSTL, Pipelined DDR SRAM
CODE
000
001
010
011
100
101
110
111
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.
00010100011000000
BIT SIZE (x18)
00000101100
256K x 36
xxxxxx
00100
000
32
69
1
3
1
0.16µm Process
2.5V V
DESCRIPTION
Reserved for version number.
Defines 256K x 36 DDR 4-word burst.
Defines width of x36 bits.
Reserved for future use.
Allows unique identification of SRAM vendor.
Indicates the presence of an ID register.
18
DD
Micron Technology, Inc., reserves the right to change products or specifications without notice.
, HSTL, PIPELINED DDR SRAM
256K x 36
©2003, Micron Technology Inc.
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