80
Appendix
Figure 14
Timing Diagram
Table 13
GPIO Pin Assignment (D-sub 9-pin Connector)
Pin
Signal Description
1
HIGH (3.3 V)
2
ADC 5
3
Print job ready (output) (GPIO A25)
4
External device ready (input) (GPIO D04)
5
Printer error (output) (GPIO D08)
6
LOW (0 V)
7
NC
8
NC
9
NC
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