CXP874P60 Datasheet, PDF (17/32 Pages) Sony Corporation – CMOS 8-bit Single Chip Microcomputer

CXP874P60
AC Characteristics
(1) Clock timing
(Ta = –10 to +75°C, VDD = 3.0 to 5.5V, Vss = 0V)
Item
Symbol Pin
Condition
Min. Max. Unit
System clock frequency
fC
XTAL
EXTAL
Fig. 1,
Fig. 2
VDD = 4.5 to 5.5V
1
1
16
MHz
12
System clock
input pulse width
tXL,
XTAL
Fig. 1,
VDD = 4.5 to 5.5V 28
tXH
EXTAL Fig. 2 (External clock drive)
37.5
ns
System clock input
rising and falling times
tCR, XTAL
Fig. 1, Fig. 2
tCF
EXTAL (External clock drive)
200 ns
Event count clock input
pulse width
tEL,
tEH
PE1/EC Fig. 3
tsys × 4^∗
ns
Event count clock input
rising and falling times
tER,
tEF
PE1/EC Fig. 3
20 ms
∗ _{tsys indicates three values according to the contents of the clock control register (address; 00FEH) upper}
2 bits (CPU clock selection).
tsys [ns] = 2000/fc (Upper 2 bits = "00"), 4000/fc (Upper 2 bits = "01"), 16000/fc (Upper 2 bits = "11")
Fig. 1. Clock timing
1/fc
XTAL
EXTAL
tXH
tCF
Fig. 2. Clock applied condition
Crystal oscillation
Ceramic oscillation
VDD – 0.4V
0.4V
tXL
tCR
External clock
EXTAL XTAL
C1
C2
EXTAL XTAL
74HC04
Fig. 3. Event count clock timing
EC
tEH
tEF
tEL
0.8VDD
0.2VDD
tER
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