參數(shù)資料
型號: CY7C1256V18-300BZXC
廠商: CYPRESS SEMICONDUCTOR CORP
元件分類: DRAM
英文描述: 36-Mbit QDR⑩-II+ SRAM 4-Word Burst Architecture (2.0 Cycle Read Latency)
中文描述: 4M X 9 QDR SRAM, 0.45 ns, PBGA165
封裝: 15 X 17 MM, 1.40 MM HEIGHT, LEAD FREE, MO-216, FBGA-165
文件頁數(shù): 18/28頁
文件大?。?/td> 1042K
代理商: CY7C1256V18-300BZXC
CY7C1241V18
CY7C1256V18
CY7C1243V18
CY7C1245V18
Document Number: 001-06365 Rev. *C
Page 18 of 28
Identification Register Definitions
Instruction
Field
Value
Description
CY7C1241V18
CY7C1256V18
CY7C1243V18
CY7C1245V18
Revision
Number (31:29)
000
000
000
000
Version number.
Cypress Device
ID (28:12)
11010010101000111 11010010101001111 11010010101010111 11010010101100111 Defines the type
of SRAM.
Cypress JEDEC
ID (11:1)
00000110100
00000110100
00000110100
00000110100
Enables unique
identification of
SRAM vendor.
ID Register
Presence (0)
1
1
1
1
Indicates the
presence of an
ID register.
Scan Register Sizes
Register Name
Bit Size
Instruction
3
Bypass
1
ID
32
Boundary Scan
109
Instruction Codes
Instruction
Code
Description
EXTEST
000
Captures the input/output ring contents.
IDCODE
001
Loads the ID register with the vendor ID code and places the register between
TDI and TDO. This operation does not affect SRAM operation.
SAMPLE Z
010
Captures the input/output contents. Places the boundary scan register between
TDI and TDO. Forces all SRAM output drivers to a High-Z state.
RESERVED
011
Do Not Use: This instruction is reserved for future use.
SAMPLE/PRELOAD
100
Captures the input/output ring contents. Places the boundary scan register
between TDI and TDO. Does not affect the SRAM operation.
RESERVED
101
Do Not Use: This instruction is reserved for future use.
RESERVED
110
Do Not Use: This instruction is reserved for future use.
BYPASS
111
Places the bypass register between TDI and TDO. This operation does not affect
SRAM operation.
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