CXP508L4 データシートの表示（PDF） - Sony Semiconductor

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CXP508L4

CMOS 4-bit Single Chip Microcomputer

Sony Semiconductor 

CXP508L4/508L6

AC characteristics

(1) Clock timing

(Ta = –20 to +75°C, VDD = 2.4 to 3.5V, VSS = 0V)

Item

Symbol Pin

Condition

Min. Max. Unit

System clock frequency

fc

System clock input pulse width

tXL

tXH

System clock input rising and falling tCR

times

tCF

XTAL

EXTAL

EXTAL

EXTAL

Fig. 1., Fig. 2.

Fig. 1., Fig. 2.∗1

External clock drive

Fig. 1., Fig. 2.∗1

External clock drive

0.5

2 MHz

230

ns

200 ns

Event count clock input pulse width

tEL

tEH

EC

Fig. 3.

tsys∗2 + 0.05

µs

Event count clock input rising and tER

falling times

tEF

EC

Fig. 3.

20 ms

∗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

1/fc

EXTAL

VDD – 0.4V

0.4V

tXH

tCF

tXL

tCR

Fig. 2. Clock applying condition

Crystal oscillation

Ceramic oscillation

EXTAL XTAL

C1

C2

External clock∗1

EXTAL XTAL

OPEN

Fig. 3. Event count clock timing

EC

tEH

tEF

tEL

–6–

0.8VDD

0.2VDD

tER

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