Sharp PC-1211 Service Manual page 15

15
Pin No.
Signal name
In/Out
Description
42 Sl3 Out Busy signal to the printer.
43 Sl2 Out
Expansion signal
-~
During display: Low
Depression of the CA (ON) key causes an instant pulse
generation.
49 S6 Out
For DEF symbol display (engaged: low, not engaged: high)
54 Sl
Out
For symbol display (SHIFT, DGE, RAD, GRAD, RESERVE,
PRO, RUN)
Same waveform as the segment signal.
55
Kil
In
CPU I Busy signal (High during the execution in CPU I)
(Sl6a)
56 K.i2 In Expansion signal
To
be connected to Sl 2 (CPU II) for PC-1211.
57 K.i3 In
Printer Busy signal
Low when the priner is not operated.
58 K.i4 In
Printer connection identifying signal.
Low when the printer is not connected.
59
l~5
In
Cassette reproduct signal.
60 K.i6 In
ON key input signal
1)
)
)