Z80 Datasheet, PDF (240/330 Pages) Zilog, Inc. – Z80 CPU PERIPHERALS

< %27 2GTKRJGTCNU
7UGT /CPWCN
220
33
34
IEI
IEO
M1
+5V
W/RDYA
N/C
SYNCA
RxDA
RxCA
TxCA
TxDA
44
1
Z804C43
CMOS Z80
SIO/3
22
CE
B/A
C/D
RD
GND
N/C
W/RDYB
SYNCB
RxDB
RxCB
TxCB
12
11
Figure 107. Z80 SIO/3 Pin Assignments
UM008101-0601
Serial Input/Output