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NEC PD17062 User Manual

Page 179

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179

µ

PD17062

Fig. 14-5 Power-on Reset and V

DD

(a) During normal operation (including halt state)

(b) At clock-stop

(c) When V

DD

rises from 0 V

5 V

0 V

“H”

Normal operation

Device operation

stopped

X

OUT

V

DD

CE

Power-on

clear signal

Power-on clear release
Oscillation start

Power-on reset
Program starts from address 0

Halt state

50 ms

Power-on clear voltage

3.5 V

5 V

Clock-stop

Device operation

stopped

X

OUT

V

DD

CE

Power-on

clear signal

Power-on clear release
Oscillation start

Power-on reset
Program starts from address 0

Halt state

50 ms

2.2 V

Power-on clear voltage

3.5 V

STOP 0000B

Normal operation

“L”

5 V

0 V

Device operation stopped

X

OUT

V

DD

CE

Power-on

clear signal

Power-on clear release
Oscillation start

Power-on reset
Program starts from address 0

Halt state

50 ms

3.5 V

Power-on clear voltage

“L”