CXP-82220 datasheet(14/21 Pages) SONY

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CXP82220/82224

∗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")

EXTAL

tXH

tXL

tCF

tCR

0.4V

VDD – 0.4V

1/fc

External clock

EXTAL

XTAL

74HC04

Crystal oscillation

Ceramic oscillation

EXTAL

XTAL

32kHz clock applied condition

Crystal oscillation

TEX

AC Characteristics

(1) Clock timing

System clock frequency

System clock input pulse width

System clock input rise time,

fall time

Event count input clock

pulse width

Event count input clock

rise time, fall time

System clock frequency

Event count input clock input

pulse width

Event count input clock rise

time,fall time

tXL,

tXH

tCR,

tCF

tEH,

tEL

tER,

tEF

tTL,

tTH

tTR,

tTF

XTAL

EXTAL

EC0

EC1

EC0

EC1

TEX

MHz

kHz

µs

Item

Symbol

Pins

Conditions

Unit

Fig. 1, Fig. 2

External clock drive

Fig. 1, Fig. 2

External clock drive

Fig. 3

VDD = 2.7 to 5.5V

Fig. 2 (32kHz clock

applied condition)

Fig. 3

Typ.

32.768

Min.

37.5

tsys + 50∗1

Max.

200

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

Fig. 1. Clock timing

Fig. 2. Clock applied conditions

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