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CXP508L4 Datasheet(PDF) 6 Page - Sony Corporation

Part No. CXP508L4
Description  CMOS 4-bit Single Chip Microcomputer
Download  11 Pages
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Maker  SONY [Sony Corporation]
Homepage  http://www.sony.co.jp
Logo SONY - Sony Corporation

CXP508L4 Datasheet(HTML) 6 Page - Sony Corporation

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CXP508L4/508L6
AC characteristics
(1) Clock timing
(Ta = –20 to +75°C, VDD = 2.4 to 3.5V, VSS = 0V)
Item
System clock frequency
System clock input pulse width
System clock input rising and falling
times
Event count clock input pulse width
Event count clock input rising and
falling times
fc
tXL
tXH
tCR
tCF
tEL
tEH
tER
tEF
XTAL
EXTAL
EXTAL
EXTAL
EC
EC
Fig. 1., Fig. 2.
Fig. 1., Fig. 2.∗1
External clock drive
Fig. 1., Fig. 2.∗1
External clock drive
Fig. 3.
Fig. 3.
0.5
230
tsys∗2 + 0.05
2
200
20
MHz
ns
ns
µs
ms
Symbol
Pin
Condition
Min.
Max. Unit
1 The external clock in Fig. 2. specified only when the option is selected for crystal or ceramic oscillation.
2 tsys = 8/fc
Note) When adjusting the frequency accurately, there may be cases in which they may differ from Fig. 2.
Fig. 1. Clock timing
EXTAL
tXH
tXL
tCF
tCR
0.4V
VDD – 0.4V
1/fc
Fig. 2. Clock applying condition
External clock1
EXTAL
XTAL
Crystal oscillation
Ceramic oscillation
EXTAL
XTAL
C1
C2
OPEN
Fig. 3. Event count clock timing
EC
tEH
tEL
tEF
tER
0.2VDD
0.8VDD


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