Citizen CBM-202PC-04, User Manual

Page: 31 / 88

CBM-202PC-04 User’s Manual
31 CITIZEN
2) Bus Timing
VCC=5.0V±10%, AVCC=5.0V±10%, VREF=4.5V~AVCC, VSS=AVSS=0V, Ø=2~16MHz,
TA=-20~+75ºC
Item Symbol MIN MAX
Clock cycle time t cyc 62.5 500
Clock pulse width "LOW" level time
t
CL
20 -
Clock pulse width "HIGH" level time
t
CH
20 -
Clock rise time
t
CR
- 10
Clock fall time t
CF
- 10
Address delay time
t
AD
- 30
Address hold time
t
AH
10 -
Address strobe delay time
t
ASD
- 30
Write strobe delay time t
WSD
- 30
Strobe delay time t
SD
- 30
Write data strobe pulse width 1
t
WSW1
35 -
Write data strobe pulse width 2
t
WSW2
65 -
Address setup time 1
t
AS1
10 -
Address setup time 2 t
AS2
40 -
Read data setup time t
RDS
20 -
Read data hold time
t
RDH
0 -
Write data delay time
t
WDD
- 60
Write data setup time 1
t
WDS1
35 -
Write data setup time 2 t
WDS2
5 -
Write data hold time
t
WDH
20 -
Read data access time 1
t
ACC1
- 55
Read data access time 2
t
ACC2
- 115
Unit : ns