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Setting for jp2 – Epson S5U1C17801T1100 User Manual

Page 29

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8 JUMPER SWITCH SETTINGS

S5U1C17801T1100 HARDWARE MANUAL

EPSON

23

(SOFTWARE EVALUATION TOOL FOR S1C17801)

Setting for JP2

JP2 can be used to select the power supply source for RTCV

DD

as shown in the following. Short 2-3 on JP2 to se-

lect V

DD

for the power supply to RTCV

DD

, whereas 1-3 to select battery. For details, see the description of RTC

control circuit in Chapter 10. Note that, when 1-2 is shorted, a coin cell battery is required to activate RTCV

DD

.

Factory default setting for JP2 is 1-2 shorted.

JP2

JP2

C55

0.1µF

C47

10µF

JP2

DIC-149-3P

1

2

1

2

3

To RTCV

DD

V

DD

D10

CRS06

BAT1

106

V

DD

Battery

+

–

Fig. 8.2.1 JP2 Related Circuit

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