CXP-85232A datasheet(12/20 Pages) SONY

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– 12 –

CXP85112B/85116B, CXP85220A/85224A/85228A/85232A

AC Characteristics

(1) Clock timing

∗1 tsys indicates the three values below according to the upper two bits (CPU clock selection) of the clock

control register (address: 00FEH).

tsys [ns] = 2000/fc (upper two bits = "00"), 4000/fc (upper two bits = "01"), 16000/fc (upper two bits = "11")

System clock frequency

System clock input

pulse width

System clock input rise

time, fall time

Event clock input clock

pulse width

Event count input clock

rise time, fall time

tXL,

tXH

tCR,

tCF

tEH,

tEL

tER,

tEF

XTAL

EXTAL

MHz

Item

Symbol

Pins

Conditions

Min.

Max.

Unit

Fig. 1, Fig. 2

External clock drive

Fig. 1, Fig. 2

External clock drive

Fig. 3

4.5

200

3.5

100

tsys + 50∗1

(Ta = –20 to +75°C, VDD = 4.5 to 5.5V, Vss = 0V reference)

Fig. 1. Clock timing

EXTAL

tXH

tXL

tCF

tCR

0.4V

VDD – 0.4V

1/fc

Fig. 2. Clock applying condition

Crystal oscillation

Ceramic oscillation

EXTAL

XTAL

External clock

EXTAL

XTAL

OPEN

Fig. 3. Event count clock timing

tEH

tEL

tEF

tER

0.2VDD

0.8VDD

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