CMOSTEK CMT2380F17 Manual page 105

Bit 7~6: P6.0 function configured control bit 1 and 0. The two bits only act when internal RC oscillator
(IHRCO or ILRCO) is selected for system clock source. In external clock input mode, P6.0 is the
dedicated clock input pin. In internal oscillator condition, P6.0 provides the following selections for GPIO
or clock source generator. When P60OC[1:0] index to non-P6.0 GPIO function, P6.0 will drive the on-chip
RC oscillator output to provide the clock source for other devices.
Please refer Section "9 System Clock" to get the more detailed clock information. For clock-out on
P6.0 function, it is recommended to set P6M0.0 to "1" which selects P6.0 as push-push output mode.
Bit 5: P60FD, P6.0 Fast Driving. 0: P6.0 output with default driving.
1: P6.0 output with fast driving enabled. If P6.0 is configured to clock output, enable this bit when
P6.0 output frequency is more than 12MHz at 5V application or more than 6MHz at 3V application.。

AUXR3: Auxiliary Register 3
SFR Page = 0 only
SFR Address = 0xA4
Bit 7
Name
T0PS1
R/W R/W
Reset V alue 0
Bit 7~6: T0PS1~0, Timer 0 Port pin Selection [1:0].
Bit 0: T0XL is the timer 0 prescaler control bit. For T0XL function definition, please refer to T0X12
(AUXR2.2).
Bit 3: S0PS0, Serial Port 0 pin Selection 0. (Add new S0PS1 at AUXR10.3)
Bit 2~1: TWIPS1~0, TWI0/I2C0 Port pin Selection [1:0].

AUXR4: Auxiliary Register 4
SFR Page = 1 only
SFR Address = 0xA4
Bit 7
Name
T2PS1
R/W R/W
Reset V alue 0
P60 function
P60OC[1:0]
00
01
10
11
6 5
T0PS0 BPOC1
R/W R/W
0 0
T0PS1~0
S0PS1, S0PS0
00
01
10
11
TWIPS[1:0]
00
01
10
11
6 5
T2PS0 T1PS1
R/W R/W
0 0
P60
MCK
MCK/2
MCK/4
4 3
BPOC0 S0PS0
R/W R/W
0 0
T0/T0CKO
00 P3.4
01 P4.4
10 P2.2
11 P1.7
RxD0
P3.0
P4.4
P3.1
P1.7
TWI0/I2C0_SCL TWI0/I2C0_SDA
P3.1
P6.0
P3.0
P2.2
4 3
T1PS0 --
R/W W
0 0
Rev0.1 | 105/347
CMT2380F17
I/O mode
By P6M0.0
By P6M0.0
By P6M0.0
By P6M0.0
2
TWIPS1 TWIPS0
R/W R/W
0
TxD0
P3.1
P4.5
P3.0
P2.2
P3.0
P6.1
P3.1
P2.4
2
-- --
W W
0
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1 0
T0XL
R/W
0 0
1 0
--
W
0 0