ST7558
13. TIMING CHARACTERISTICS
System Bus Read/Write Characteristics 1 (For the 8080 Series MPU)
A0
tAW 8
/CS
tAH8
tCYC8
tCCLR,tCCLW
W R,RD
tCCHR,tCCHW
tDH8
tDS8
D0toD7
(W rite)
tACC8
tOH8
D0toD7
(Read)
Fig 24.
(VDD = 3.3V , Ta =-30~85°C)
Rating
Units
Item
Address hold time
Signal
Symbol
tAH8
Condition
Min.
10
0
Max.
—
A0
Address setup time
tAW8
—
System cycle time
tCYC8
tCCLW
tCCHW
tCCLR
tCCHR
tDS8
240
80
80
140
80
40
0
—
Enable L pulse width (WRITE)
Enable H pulse width (WRITE)
Enable L pulse width (READ)
Enable H pulse width (READ)
WRITE Data setup time
WRITE Address hold time
READ access time
—
WR
RD
—
ns
—
—
—
70
50
tDH8
D0 to D7
tACC8
tOH8
CL = 100 pF
CL = 100 pF
—
READ Output disable time
5
Ver 2.3
39/56
2005/10/05
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
