CMOSTEK CMT2380F17, Manual

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CMT2380F17
Rev0.1 | 226/347
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Bit 3: T1X12, Timer 1 clock source selector while C/T=0.
0: Clear to select SYSCLK/12.
1: Set to select SYSCLK as the clock source. If set, the UART0 baud rate by Timer 1 in Mode 1 and Mode
3 is 12 times than standard 8051 function.
。

AUXR3
：
Auxiliary Register 3
SFR Page = 0 only
SFR Address = 0xA4
Bit 7 6 5 4 3 2 1 0
Name T0PS1 T0PS0 BPOC1 BPOC0 S0PS0 TWIPS1 TWIPS0 T0XL
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
Bit 3: S0PS0, Serial Port 0 pin Selection 0. (S0PS1 at AUXR10.3)
S0PS1, S0PS0 RxD0 TxD0
00 P3.0 P3.1
01 P4.4 P4.5
10 P3.1 P3.0
11 P1.7 P2.2

AUXR6
：
Auxiliary Register 6
SFR Page = 3 only
SFR Address = 0xA4
Bit 7 6 5 4 3 2 1 0
Name KBI4PS1 KBI4PS0 KBI6PS0 KBI2PS0 T3FCS T2FCS SnMIPS S0COPS
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
Bit 1: SnMIPS, S0MI & S1MI Port pin Selection.
SnMIPS S0MI S1MI
0 P1.6 P6.1
1 P3.3 P4.7
18.10 Serial Port 0 Enhance function
If SMOD3 (S0CFG.0) is set, SFR address 0xB9 will be accessed on S0CR1. S0CR1 control the
enhanced function of serial port 0 including :

Enable S0 embedded baud rate generator, S0BRG

Enable the S0 TX or RX to select the baud rate time base by S0BRG

Enable S0BRG to behave a general timer

Enable S0 to enter LIN bus mode

S0CR1
：
Serial Port 0 Control Register 1 (SMOD3 = 1)
SFR Page = 0~F
SFR Address = 0xB9
Bit 7 6 5 4 3 2 1 0
Name S0TR S0TX12 S0TCK S0RCK S0CKOE ARTE -- --
R/W R/W R/W R/W R/W R/W R/W W W
Reset Value 0 0 0 0 0 0 0 0
Bit 7: S0TR, UART0 Baud Rate Generator control bit. 0: Clear to stop S0BRG operation.
1: Set to start S0BRG operation.
Bit 6: S0TX12, S0BRG clock source selection.
0: Clear to select SYSCLK/12 as the clock source of S0BRG. 1: Set to select SYSCLK as the clock
source of S0BRG.