CXP85220A View Datasheet(PDF) - Sony Semiconductor

Part Name

Description

View to exact match

CXP85220A

CMOS 8-bit Single-chip Microcomputer

Sony Semiconductor 

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

AC Characteristics

(1) Clock timing

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

Item

Symbol Pins

Conditions

Min.

Max. Unit

System clock frequency fC

XTAL

EXTAL

Fig. 1, Fig. 2

3.5

4.5

MHz

System clock input

pulse width

tXL,

tXH

EXTAL

Fig. 1, Fig. 2

External clock drive

100

ns

System clock input rise

time, fall time

tCR,

tCF

EXTAL

Fig. 1, Fig. 2

External clock drive

200

ns

Event clock input clock

pulse width

tEH,

tEL

EC

Fig. 3

tsys + 50∗1

ns

Event count input clock tER,

rise time, fall time

tEF

EC

Fig. 3

20

ms

∗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

1/fc

tXH

tCF

tXL

Fig. 1. Clock timing

VDD – 0.4V

0.4V

tCR

Crystal oscillation

Ceramic oscillation

External clock

EXTAL XTAL

C1

C2

EXTAL XTAL

OPEN

Fig. 2. Clock applying condition

0.8VDD

EC

0.2VDD

tEH

tEF

tEL

tER

Fig. 3. Event count clock timing

– 12 –

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