BDM-610000084 Rev B
Chapter 4: Using the cpuModule 57
Non-Standard Serial Port Modes
It is possible to change the input clock rate for the UARTs of the cpuModule to allow the serial ports to operate
at higher speeds than 115,200 bps. This is accomplished by modifying the baud rate multiplier for each serial
port.
Non-standard baud rates are supported for all COM port modes of the CML24BT. :
To set an alternate maximum baud rate for a serial port, write the value which corresponds to the desired
multplier to the port’s baud rate multiplier register:
Table 33 Baud Rate Multiplier Registers
Connector
Port
Address Range (hex)
CN7 (A)
COM 1
EE0–EE1h
CN7 (B)
COM 3
EE2–EE3h
CN8 (A)
COM 2
EE4–EE5h
CN8 (B)
COM 4
EE6–EE7h
Table 34 Baud Rade Multipliers
Value
Maximum Baud Rate
bps
Multiplier
0x0E28
115,200
1x
0x38A0
460,800
4x
0x713F
921,600
8x
0x7AE1
1,000,000
8.7x
Note
When using the non-standard high speed serial port modes, it is highly recommended to use
hardware flow control, whenever possible.
Summary of Contents for CML24BT cpuModules
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