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W65C51
Asynchronous Communication Interface Adapter (ACIA)
Datasheet (PDF)
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W65C51DIP-281VSS2~CS03CS14~RES5RxC6XTLI7XTLO8~RTS9~CTS10TxD11~DTR12RxD13~IRQ14D028VCC27~DSR26~DCD25RS024RS123R/~W22PHI221D720D619D518D417D316D215D1
vcc
gnd
in
out
io
#LabelType
1VSSgnd
2~CS0in
3CS1in
4~RESin
5RxCin
6XTLIin
7XTLOout
8~RTSout
9~CTSin
10TxDout
11~DTRout
12RxDin
13~IRQout
14D0io
15D1io
16D2io
17D3io
18D4io
19D5io
20D6io
21D7io
22PHI2in
23R/~Win
24RS1in
25RS0in
26~DCDin
27~DSRin
28VCCvcc