CXP844P16 Datasheet, PDF (13/20 Pages) Sony Corporation – CMOS 8-bit Single Chip Microcomputer

CXP844P16
AC Characteristics
(1) Clock timing
(Ta = –10 to +75°C, VDD = 4.5 to 5.5V, Vss = 0V reference)
Item
Symbol Pin
Conditions
Min. Typ. Max. Unit
System clock frequency
fC
System clock input pulse width
tXL,
tXH
System clock input
tCR,
rise time, fall time
tCF
Event count input clock
tEH,
pulse width
tEL
Event count input clock
tER,
rise time, fall time
tEF
XTAL
EXTAL
EXTAL
EXTAL
EC
Fig. 1, Fig. 2
Fig. 1, Fig. 2
External clock drive
Fig. 1, Fig. 2
External clock drive
Fig. 3
1
37.5
tsys + 50^∗
EC
Fig. 3
10 MHz
ns
200 ns
ns
20 ms
System clock frequency
Event count input clock
input pulse width
Event count input clock
rise time, fall time
fC
TEX
TX
tTL,
tTH
TEX
tTR,
tTF
TEX
VDD = 2.7 to 5.5V
Fig. 2 (32kHz clock
application condition)
32.768
kHz
Fig. 3
10
µs
Fig. 3
20 ms
∗ _{tsys indicates the three values below according to the upper two bits (CPU clock selection) of the control}
clock register (address: 00FEH).
tsys (ns) = 2000/fc (upper two bits = "00"), 4000/fc (upper two bits = "01"), 16000/fc (upper two bits = "11")
Fig. 1. Clock timing
1/fc
EXTAL
tXH
tCF
Fig. 2. Clock application conditions
Crystal oscillation
Ceramic oscillation
External clock
VDD – 0.4V
0.4V
tXL
tCR
32kHz clock application condition
Crystal oscillation
EXTAL XTAL
C1
C2
EXTAL XTAL
74HCO4
TEX
C1
TX
C2
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