參數(shù)資料
型號: KM48S8020B
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 4M x 8Bit x 2 Banks Synchronous DRAM(4M x 8位 x 2組同步動態(tài)RAM)
中文描述: 4米× 8位× 2銀行同步DRAM(4米× 8位× 2組同步動態(tài)RAM)的
文件頁數(shù): 24/43頁
文件大?。?/td> 604K
代理商: KM48S8020B
CMOS SDRAM
DEVICE OPERATIONS - II
ELECTRONICS
REV. 3 Feb. '98
X
X
X
CA, A
10
/AP
RA
A
10
/AP
X
OP code
X
X
X
CA, A
10
/AP
CA, A
10
/AP
RA
A
10
/AP
X
X
X
X
CA, A
10
/AP
CA, A
10
/AP
RA
A
10
/AP
X
X
X
X
CA, A
10
/AP
CA, A
10
/AP
RA
A
10
/AP
X
X
X
X
CA, A
10
/AP
RA, RA
10
X
X
X
X
CA, A
10
/AP
RA, RA
10
X
X
X
X
CA
RA
A
10
/AP
FUNCTION TRUTH TABLE (TABLE 1)
Current
State
CS
RAS
CAS
WE
BA
ADDR
ACTION
Note
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
H
L
L
L
L
L
H
L
L
L
L
L
H
L
L
L
L
L
IDLE
Row
Active
Read
Write
Read with
Auto
Precharge
Write with
Auto
Precharge
Pre-
charging
NOP
NOP
ILLEGAL
ILLEGAL
Row (& Bank) Active ; Latch RA
NOP
Auto Refresh or Self Refresh
Mode Register Access
NOP
NOP
ILLEGAL
Begin Read ; latch CA ; determine AP
Begin Write ; latch CA ; determine AP
ILLEGAL
Precharge
ILLEGAL
NOP (Continue Burst to End --> Row Active)
NOP (Continue Burst to End --> Row Active)
Term burst --> Row active
Term burst, New Read, Determine AP
Term burst, New Write, Determine AP
ILLEGAL
Term burst, Precharge timing for Reads
ILLEGAL
NOP (Continue Burst to End --> Row Active)
NOP (Continue Burst to End --> Row Active)
Term burst --> Row active
Term burst, New read, Determine AP
Term burst, New Write, Determine AP
ILLEGAL
Term burst, precharge timing for Writes
ILLEGAL
NOP (Continue Burst to End --> Precharge)
NOP (Continue Burst to End --> Precharge)
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Continue Burst to End --> Precharge)
NOP (Continue Burst to End --> Precharge)
ILLEGAL
ILLEGAL
ILLEGAL
ILLEGAL
NOP --> Idle after t
RP
NOP --> Idle after t
RP
ILLEGAL
ILLEGAL
ILLEGAL
NOP --> Idle after t
RP
L
X
X
X
BA
BA
BA
X
OP code
X
X
X
BA
BA
BA
BA
X
X
X
X
BA
BA
BA
BA
X
X
X
X
BA
BA
BA
BA
X
X
X
X
BA
BA
X
X
X
X
BA
BA
X
X
X
X
BA
BA
BA
X
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
X
H
H
H
H
L
L
L
X
H
H
H
H
L
L
L
X
H
H
H
L
L
X
H
H
H
L
L
X
H
H
H
L
L
X
H
H
L
H
H
L
L
X
H
H
L
L
H
H
L
X
H
H
L
L
H
H
L
X
H
H
L
L
H
H
L
X
H
H
L
H
L
X
H
H
L
H
L
X
H
H
L
H
H
X
H
L
X
H
L
H
L
X
H
L
H
L
H
L
X
X
H
L
H
L
H
L
X
X
H
L
H
L
H
L
X
X
H
L
X
X
X
X
H
L
X
X
X
X
H
L
X
H
L
2
2
4
5
5
2
2
3
2
3
3
2
3
2
2
2
2
2
4
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