Citizen Systems CBM-231 - Manual (Page 47)

CBM-230/231 User’s Manual
42 CITIZEN
(25) Transmitting the status of the peripheral device (ESC u n)
Code : [1B]h + [75]h + n
* {n = 0}
Transmits the current status of connector pin No.3.
•
"n" has the following meanings.
n (Hex) Type
0 Drawer kick connector No. 3
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The transmitted status is of 1 byte and its contents are shown in the table below.
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When nothing is connected to the connector, The bit 0 of "n" is always "1".
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In case of DTR/DSR control, only one byte is transmitted after confirming that the host is ready to
receive (DSR signal is in Space mode). In case of XON/ XOFF control, only one byte is transmitted
without confirming the state of the DSR signal.
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In case of DTR/DSR control, if the host is not ready to receive (DSR signal is in the Mark mode), it
waits to get ready to receive.
Value
Bit Function
0 1
0 No. 3 pin's level “L” “H”
1 Undefined
2 Undefined
3 Undefined
4 Unused Fixed to 0 –
5 Undefined
6 Undefined
7 Undefined
[Caution] Serial interface only