Z80185 Datasheet, PDF (93/95 Pages) Zilog, Inc. – SMART PERIPHERAL CONTROLLERS

Zilog
PRELIMINARY
Z80185/Z80195
SMART PERIPHERAL CONTROLLES
ELECTRICAL CHARACTERISTICS (Continued)
The following table shows the characteristics of each pin
in terms of the above classifications. A dash "–" in the input
or output column indicates the pin does not have that
function.
Pin
/BUSREQ
/CTS
/CTS0/RxS
/DCD
/DCD0/CKA1
/DTR
/HALT
/INT0
/INT1
/INT2
/IOCS
/IORQ
/M1
/MREQ
/NMI
/RAMCS
/RD
/RESET
/RFSH
/ROMCS
/RTS
/RTS0/TxS
/RTXC
/TRXC
/WAIT
/WR
A0-A19
Table 9. Pin Classification Characteristics
Input Class
Output Class
Pin
Input Class
I
–
Busy
S
I
–
CKA0/CKS
I
I
–
D0-D7
I
I
–
EXTAL
R
I
3
IEI
I
IEO
–
–
O
–
O
nAck
S
I
D
nAutoFd
S
I
–
nFault
S
I
–
nInit
S
–
O
nSelectIn
S
nStrobe
S
I
3
I
3
PError
S
I
3
PHI
–
R
–
PIA13-10/CLKTRG3-0 I
–
O
PIA15-13/ZCTO2-0
I
I
3
PIA27-20
S
RXA0
I
R
D
–
O
RXA1
I
–
O
RXD
I
–
O
/ST
–
–
O
Select
S
TOUT//DREQ
I
I
3
I
3
TXA0
–
I
D
TXA1
–
I
3
TXD
–
I
3
XTAL
–
Output Class
T
3
3
–
–
O
T
T
T
T
T
T
T
H
3
3
T
–
–
–
O
T
O
O
O
O
O
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