參數(shù)資料
型號: μPD4811650
廠商: NEC Corp.
英文描述: 16M Synchronous Graphics Memory (SGRAM)(16M同步圖形存儲(chǔ)器)
中文描述: 1,600同步圖形存儲(chǔ)器(SGRAM)(1,600同步圖形存儲(chǔ)器)
文件頁數(shù): 37/96頁
文件大小: 1517K
代理商: ΜPD4811650
37
μ
PD4811650 for Rev. E
Preliminary Data Sheet
14. Read/Write Command Interval
14.1 Read to Read Command Interval
During a read cycle, when new Read command is asserted, it will be effective after /CAS latency, even if the
previous Read operation does not completed. Read command will be interrupted by another Read command.
The interval between the commands is minimum 1 cycle. Each Read command can be asserted in every clock
without any restriction.
QB1
QB2
QB3
QB4
Hi-Z
READ A
DQ
Command
CLK
T0
T2
T1
T3
T4
T5
T6
T7
T8
Burst length = 4, /CAS latency = 2
READ B
QA1
1cycle
14.2 Write to Write Command Interval
During a write cycle, when new Write command is asserted, the previous burst will terminate and the new burst will
begin with a new Write command. Write command will be interrupted by another Write command.
The interval between the commands is minimum 1 cycle. Each Write command can be asserted in every clock
without any restriction.
DB1
DB2
DB3
DB4
Hi-Z
WRIT A
DQ
Command
CLK
T0
T2
T1
T3
T4
T5
T6
T7
T8
Burst length = 4, /CAS latency = 2
WRIT B
DA1
1cycle
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