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Sony CMOS CXP854P60 Specification Page 12

8-bit single-chip microcomputer.
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AC Characteristics
(1) Clock timing
Item
System clock frequency
System clock input
pulse width
System clock
rise and fall times
Event counter input
clock pulse widtth
Event counter input clock
rise and fall times
t
sys indicates one of three values according to the contents of the clock control register. (For CPU clock
selection.)
t
sys (ns) = 2000/fc (Upper 2 bits = "00"), 4000/fc (Upper 2 bits = "01"), 16000/fc (Upper 2 bits = "11")
Fig. 1. Clock timing
EXTAL
Fig. 2. Clock applied condition
Fig. 3. Event count clock timing
EC
System
Pin
XTAL
Fig. 1, Fig. 2
f
C
EXTAL
t
,
Fig. 1, Fig. 2
XL
EXTAL
t
External clock drive
XH
t
,
Fig 1, Fig 2
CR
EXTAL
t
External clock drive
CF
t
,
EH
EC
Fig. 3
t
EL
t
,
ER
EC
Fig. 3
t
EF
t
XH
Crystal oscillator
Ceramic oscillator
EXTAL
XTAL
C
C
1
2
t
EH
(Ta = –10 to +75°C, V
Condition
1/fc
t
t
CF
XL
External clock
EXTAL
t
t
EF
EL
– 12 –
= 4.5 to 5.5V, Vss = 0V)
DD
Min.
Max.
3.5
9
50
200
t
sys + 50
20
V
– 0.4V
DD
0.4V
t
CR
XTAL
OPEN
0.8V
DD
0.2V
DD
t
ER
CXP854P60
Unit
MHz
ns
ns
ns
ms

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