Rainbow Electronics T89C5121 - Manual (Page 94)

94
A/T8xC5121
4164G–SCR–07/06
Table 68. BDRCON Register
BDRCON
Baud Rate Control Register (9Bh)
Reset Value = XXX0 0000b
7 6 5 4 3 2 1 0
- - - BRR TBCK RBCK SPD SRC
Bit
Number
Bit
Mnemonic Description
7 -
Reserved
The value read from this bit is indeterminate. Do not set this bit
6 -
Reserved
The value read from this bit is indeterminate. Do not set this bit
5 -
Reserved
The value read from this bit is indeterminate. Do not set this bit.
4 BRR
Baud Rate Run Control bit
Clear to stop the Baud Rate.
Set to start the Baud Rate.
3 TBCK
Transmission Baud rate Generator Selection bit for first UART
Clear to select Timer 1 for the Baud Rate Generator.
Set to select internal Baud Rate Generator.
2 RBCK
Reception Baud Rate Generator Selection bit for first UART
Clear to select Timer 1 for the Baud Rate Generator.
Set to select internal Baud Rate Generator.
1 SPD
Baud Rate Speed Control bit for first UART
Clear to select the SLOW Baud Rate Generator when SRC = 1.
Set to select the FAST Baud Rate Generator when SRC = 1.
0 SRC
Baud Rate Source select bit in Mode 0 for first UART
Clear to select F
OSC
/12 as the Baud Rate Generator.
Set to select the internal Baud Rate Generator.