Pin descriptions, Figure, Scc/escc user manual – Zilog Z80230 User Manual
Page 16: Z80x30 pin functions
SCC/ESCC
User Manual
UM010903-0515
General Description
9
Pin Descriptions
Z80x30 Pin Functions
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
/AS
/DS
R//W
CS1
/CS0
/INT
/INTACK
IEI
IEO
TxDA
RxDA
/TRxCA
/RTxCA
/SYNCA
/W//REQA
/DTR//REQA
/RTSA
/CTSA
/DCDA
TxDB
RxDB
/TRxCB
/RTxCB
/SYNCB
Serial
Data
Channel
Clocks
Channel
Controls
for Modem,
DMA and
Other
/W//REQB
/DTR//REQB
/RTSB
/CTSB
/DCDB
Interrupt
Address
Data Bus
Serial
Data
Channel
Clocks
Control
Bus Timing
and Reset
Channel
Controls
for Modem,
DMA and
Other
Z80X30
Channel A
Channel B