B&B Electronics 232BRC - Manual - Manual (Page 9)

232BRC-0812 Manual 7
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91 792444 – Fax +353 91 792445
Chapter 2: OPERATION
Each port receives data from its connected device, buffers the
data, and sends it out the opposite port when that port’s handshaking
indicates it is ready to receive data. Each port is set to match the
requirements of its connected device through the setup software.
Unused output handshake lines are held high by the 232BRC. Pin
6 (DSR) on Port A and Pin 4 (DTR) on Port B are held in a constant
true state. This provides a constant enabled signal to connected
devices that need it, or provides a positive voltage to devices that
derive their power from these lines.
Port Configurations
The 232BRC provides a dedicated UART to ports A and B. This
allows each port to be individually configured for baud rate, number
of data bits, parity, and hardware (RTS/CTS) or software
(XON/XOFF) handshaking. Configuration parameters are set
through the setup software.
Baud rate:
Each port supports the following standard baud rates:
300
600
1200
2400
4800
9600
19.2k
38.4k
57.6k
or 115.2 kbps
In addition, non-standard baud rates between 300 and 115.2
kbps can also be set. The 232BRC uses a 1.152 MHz clock for its
base data rate, so any rate that can be evenly divided into 1.152 MHz
can be set exactly.
For example:
28.8 kbps = 1.152 MHz / 40