¡ Semiconductor
MSM82C51A-2RS/GS/JS
AC CHARACTERISTICS
CPU Bus Interface Part
(VCC = 4.5 to 5.5 V, Ta = –40 to 85°C)
Parameter
Address Stable before RD
Address Hold Time for RD
RD Pulse Width
Symbol
tAR
Unit
ns
Remarks
Note 2
Note 2
—
Min.
20
Max.
—
tRA
20
ns
—
tRR
130
ns
—
Data Delay from RD
tRD
—
10
6
ns
—
100
75
—
—
—
—
—
—
—
—
RD to Data Float
tDF
ns
—
Note 5
Note 2
Recovery Time between RD
Address Stable before WR
Address Hold Time for WR
WR Pulse Width
Data Set-up Time for WR
Data Hold Time for WR
Recovery Time between WR
RESET Pulse Width
tRVR
tAW
tCY
ns
20
20
100
100
0
tWA
ns
Note 2
tWW
tDW
ns
—
—
—
ns
tWD
ns
tRVW
tRESW
6
tCY
tCY
Note 4
—
6
13/26
OKI [ OKI ELECTRONIC COMPONETS ]
