User`s manual

PK220030 s Subsystems
Table 3-4 lists JP3 jumper settings and Figure 3-10 illustrates jumper
setting configurations for the two serial channels. If only one RS-232
channel is desired, use one of the first two configurations. With these
configurations, the RS-485 port is also active on the second Z180 serial
channel (Z1). Unless the application software explicitly enables Z1, the
RS-485 channel has no effect on the Z180. The RS-485 is connected to
Z1 in the first two configurations in order to keep the Z180 CMOS input
(RXA1) from floating.
Figure 3-10. JP3 Jumper Settings
FD
12
34
56
78
910
11 12
JP3
13
14
Two 3-wire RS-232
12
34
56
78
910
11 12
JP3
13
14
One 3-wire RS-232
One RS-485
12
34
56
78
910
11 12
JP3
13
14
One 5-wire RS-232 and
One RS-485
Table 3-4. JP3 Serial Communication Jumper Settings
JP3 Jumpered Pins Serial Communication Configuration
5–6,
7–8,
9–11
One 5-wire RS-232 channel
(Z180 Port 0) with RTS/CTS
One RS-485 channel (port 1)
7–8
One 3-wire RS-232
One RS-485
5–7
11–13
Two 3-wire RS-232