ST7558
System Bus Read/Write Characteristics 1 (For the 6800 Series MPU)
A0
R/W
tAW 6
tAH6
CS1
(CS2="1")
tCYC6
tCCLR,tCCLW
E
tCCHR,tCCHW
tDH6
tDS6
D0toD7
(W rite)
tACC6
tOH6
D0toD7
(Read)
Fig 25.
(VDD = 3.3 V , Ta = -30~85°C )
Rating
Units
Item
Signal
Symbol
tAH6
Condition
Min.
10
0
Max.
—
Address hold time
Address setup time
System cycle time
A0
tAW6
—
tCYC6
240
80
80
80
140
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
tEWLW
tEWHW
tEWLR
tEWHR
tDS6
—
WR
RD
—
ns
—
—
—
70
50
WRITE Address hold time
READ access time
tDH6
D0 to D7
tACC6
tOH6
CL = 100 pF
CL = 100 pF
—
READ Output disable time
5
Ver 2.3
41/56
2005/10/05
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
