ZiLOG Z8018500ZCO User Manual page 38

Z
ILOG
Serial Interface
The serial I/O pins of the Z80185/195 serial controller are connected to the J9–J13 connector blocks
through RS-232 or RS-422 drivers and receivers. J9–J12 are EIA-570 DB-25 connectors for the three
serial ports (ASCI0, ASCI1, and EMSCC) of the Z80185/195.
Jumper
J9
J10
J11
J12
J13
The following option jumpers are associated with the above ports:
Pin
Jumper Numbers
J15 2–3
J15 4–5
J15 6–7
To use J9 as RS-232 DTE:
Pin
Jumper Numbers
J8 4–6, 7–9, 8–10
To use J9 as RS-232 DCE:
Pin
Jumper Numbers
J8 4–6, 7–8, 9–10
4-2
Description
ASCI1, data (TXD and RXD) only, female, DTE or DCE
pinning.
EMSCC, male DTE pinning.
EMSCC, female DCE pinning.
ASCI0, male DTE pinning.
ASCI0, female DCE pinning.
Description
Insert jumper to use J10 or J11 rather than J16 with the
ESCC.
Insert jumper to use RS-422 signaling on J10 and J10.
Remove to use RS-232.
Insert jumper to use RS-422 signaling on J12 and J13.
Remove to use RS-232.
Z80185/195 D K
EVELOPMENT IT
U ' M
SER S ANUAL
UM951800100