參數(shù)資料
型號: HYB39S256160T
廠商: SIEMENS AG
英文描述: 256 MBit Synchronous DRAM(256M位同步動態(tài)RAM)
中文描述: 256兆比特同步DRAM(256M位同步動態(tài)RAM)的
文件頁數(shù): 21/46頁
文件大小: 594K
代理商: HYB39S256160T
HYB39S256400/800/160AT
256 MBit Synchronous DRAM
21
1. Bank Activate Command Cycle
(CAS latency = 3)
2. Burst Read Operation
(Burst Length = 4, CAS latency = 2, 3)
T0
ADDRESS
CLK
T0
T
T1
T
T
T
T
COMMAND
NOP
NOP
NOP
Bank A
Row Addr.
Bank A
Activate
Write A
with Auto
Bank A
Col. Addr.
. . . . . . . . . .
. . . . . . . . . .
. . . . . . . . . .
Bank B
Activate
Bank A
Row Addr.
Bank A
Activate
t
RCD
: “H” or “L”
t
RC
t
RRD
Bank B
Row Addr.
COMMAND
READ A
NOP
NOP
NOP
NOP
NOP
NOP
NOP
t
CK2,
DQ’s
CAS latency = 2
t
CK3,
DQ’s
CAS latency = 3
NOP
CLK
T2
T1
T3
T4
T5
T6
T7
T8
DOUT A0
DOUT A1
DOUT A2
DOUT A3
DOUT A0
DOUT A1
DOUT A2
DOUT A3
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