Cmsemicon CMS80F731 Series, Reference Manual

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CMS80F731x Reference Manual
14.
Baud Rate Timer (BRT)
14.1 Overview
The chip has a 16-bit baud rate timer BRT, which mainly provides a clock for the UART module.
14.2 Related Registers
14.2.1
BRT Module Control Register BRTCon
F5C0H
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
BRTCON BRTEN -- -- -- -- CnNS0 CnPS1 CnPS0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Reset value 0 0 0 0 0 0 0 0
Bit7 BRTEN: BRT timer enable bit;
1= Enable;
0= Disable.
Bit6~Bit3 -- Reserved, both 0;
Bit2~Bit0 BRTCKDIV<2:0> BRT timer prescale selection bit;
000= Fsys/1;
001= Fsys/2;
010= Fsys/4;
011=
100=
101=
110=
111=
Fsys/8;
Fsys/16;
Fsys/32;
Fsys/64;
Fsys/128.
14.2.2
The BRT Timer Data is Loaded With a Low 8-bit Register BRTDL
F5C1H
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
BRTDL BRTDL7 BRTDL6 BRTDL5 BRTDL4 BRTDL3 BRTDL2 BRTDL1 BRTDL0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Reset value 0 0 0 0 0 0 0 0
Bit7~Bit0 BRTDL<7:0>: BRT timer load value 8 bits lower;
14.2.3
The BRT Timer Data is Loaded With a High 8-bit Register BRTDH
F5C2H
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
BRTDH BRTDH7 BRTDH6 BRTDH5 BRTDH4 BRTDH3 BRTDH2 BRTDH1 BRTDH0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Reset value 0 0 0 0 0 0 0 0
Bit7~Bit0 BRTDH<7:0>: BRT timer load value 8 bits higher;