Casio MP-2000 Service Manual page 54

Electronic cash register
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Display Memory Output Signal Status During Standby Mode
65550 Pin#
136
123
101
157
124
102
160
159
126
125
104
103
155
100
154-145
99-90
177-162
144-143,
141-140,
138-127
122-109.
107-66
Note:
These pins are inputs when using the video input port. These pins are driven as outputs
when using an external STN-DD buffer (DRAM "C").
Signal Name
RASA#
RASB#
RASC#
WEA#
WEB#
WEC#
CASAL#
CASAH#
CASBL#
CASBH#
CASCL#
CASCH#
OEAB#
OEC#
AA9-0
CA9-0
MAD15-0
MBD15-0
MCD15-0
— 53 —
Signal Status
Driven Low
Driven Low
Driven Low (see note below)
Driven High
Driven High
Driven High (see note below)
Driven Low
Driven Low
Driven Low
Driven Low
Driven Low (see note below)
Driven Low (see note below)
Driven Low
Driven High (see note below)
Pulled low with weak resistor
Driven Low (weak)
Pulled low with weak resistor
Pulled low with weak resistor
Pulled low with weak resistor
(see note below)

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