Casio PA-2500 Specifications download pdf (Page 41)

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5V Circuit (VIO)

VEL

PEL

VPC

PCRD2

P5DCHG

ONSTATUSB

P5V

PSEL5

VCRDIF

PCRD

VCARD

Q125

Q116

Q114

Q113

Q126

L104

Q124R140

V+

EXT

Q117

Q120

D109

Q118

Q115Q128

Q111

MAX1651(IC111)

PCMCIA Circuit

DC/DC converter MAX1651 (IC111) generates 3.4 V

VEL : 5.11 V source for LCD unit.

PEL : Controls ON/OFF of VEL. From pin 160 of MB87A915 (IC3).

VPC : 3.4 V or 5.11 V source for detecting PCMCIA power.

PSEL5 : Power supply select signal for PCMCIA (H=5 V, L=3 V).

VCRDIF : 3.4 V or 5.11 V source for MB87A915 (IC3).

PCRD : Controls ON/OFF of VCRDIF, From pin 164 of MB87A915 (IC3).

VCARD : 3.4 V or 5.11 V source for PCMCIA connector.

PCRD2 : Controls ON/OFF of VCARD. From pin 163 of MB87A915 (IC3).

P5DCHG : VCRDIF control signal.

ONSTATUSB : VCRDIF control signal.

P5V : Controls ON/OFF of VPC. From pin 166 of MB87A915 (IC3).

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Casio PA-2500 Specifications Page 41