User`s manual

BL160032 s System Development
1
3
5
7
9
2
4
6
8
10
H3
/TX0 /RX1 or / CTS0
/RX0 /TX1 or / RTS0
J1
27
2826
24
23
25
19
20
J1
27
2826
24
23
25
19
20
21
22
21
22
FD
Two
3-wire RS-232
One
5-wire RS-232
& 2-wire RS-485
18
17
/CTS0
RXD1
TXD1
RXD0
TXD0
Z180
/RX1
/TX1
/RX0
/TX0
RS232CH1RX
RS232CH1TX
RXD0
TXD0
J1
20 22
24 23
/RTS0
485
485+
TXD1
RX485
J1
to
H3
to
J2
U4
(RS-232)
U9
(RS-485)
Serial Ports
Two serial ports support asynchronous communication at baud rates from
300 bps to 57,600 bps. The drivers can be configured either as two 3-wire
RS-232 ports or as one 5-wire RS-232 port (with RTS and CTS) and one
half-duplex RS-485 port.
Header H3 supports full-duplex RS-232 communication with handshake
lines. The RS-485 lines (on the screw terminals, header J2) provide half-
duplex asynchronous communication over twisted pair wires up to 3 km.
Figure 4-5 illustrates the pinout on header H3 for RS-232 communication
and provides the appropriate RS-232 and RS-485 jumper settings on head-
er J1. Figure 4-4 shows the location of the RS-485 signals on header J2.
Figure 4-5. BL1600 RS-232 Serial Port
Header H3 Pinout and Jumper Settings
When header H3 is used as the programming port, it cannot be
used as a communication port by the application. Refer to
Chapter 2, Getting Started, for information on how to pro-
gram with an XP8700 expansion board if your application will
need header H3.
Figure 4-6 shows the configuration of two 3-wire RS-232 channels.
Figure 4-6. BL1600 Configuration for Two 3-wire RS-232 Channels
!