SN8P275X Series
8-bit micro-controller build-in 12-bit ADC
SONiX TECHNOLOGY CO., LTD
Page 13
Version 0.7
1.4 PIN
DESCRIPTIONS
PIN NAME
DESCRIPTION
VDD, VSS
P
Power supply input pins for digital circuit.
RST/VPP/P3.3 I,
P
RST: System reset input pin. Schmitt trigger structure, low active, normal stay to “high”.
VPP: OTP programming pin.
Port 3.3 input pin.
Schmitt trigger structure as input mode.
No Built-in pull-up resisters.
XIN/P3.2 I/O
Oscillator input pin while external oscillator enable (crystal and RC).
Port 3.2 bi-direction pin.
Schmitt trigger structure as input mode.
Built-in pull-up resisters.
XOUT/P3.1 I/O
XOUT: Oscillator output pin while external crystal enable.
Port 3.1 bi-direction pin.
Schmitt trigger structure as input mode.
Built-in pull-up resisters.
P0.0/INT0 I/O
Port 0.0 bi-direction pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
Built-in wakeup function.
INT0 trigger pin (Schmitt trigger).
TC0 event counter clock input pin.
P0.1/INT1 I/O
Port 0.1 bi-direction pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
Built-in wakeup function.
INT1 trigger pin (Schmitt trigger).
TC1 event counter clock input pin.
P0.2/INT2 I/O
Port 0.2 bi-direction pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
Built-in wakeup function.
INT2 trigger pin (Schmitt trigger).
P1.0/SCL I/O
Port 1.0 bi-direction pin and open-drain pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
MSP serial clock input/output pin.
Programmable open-drain.
P1.1/SDA I/O
Port P1.1 bi-direction pin and open-drain pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
MSP data I/O pin.
Programmable open-drain.
P1 [7:2]
I/O
Port 1.2~P1.7 bi-direction pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
P2 [7:0]
I/O
Port 2 bi-direction pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
P3.0 I/O
Port 3.0 bi-direction pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
P4.[7:0]/AIN[7:0] I/O
Port 4 bi-direction pins. No Schmitt trigger structure.
Built-in pull-up resisters.
AIN[7:0]: ADC channel-0~7 input.
P5.0/SCK I/O
Port 5.0 bi-direction pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
SCK: SIO clock pin.
P5.1/SO I/O
Port 5.1 bi-direction pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
SO: SIO data output pin.
P5.2/SI I/O
Port 5.2 bi-direction pin and open-drain pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
SI: SIO data input pin.
P5.3/BZ1/PWM1 I/O
Port 5.3 bi-direction pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
TC1 ÷ 2 signal output pin for buzzer or PWM1 output pin.
P5.4/BZ0/PWM0 I/O
Port 5.4 bi-direction pin. Schmitt trigger structure as input mode.
Built-in pull-up resisters.
TC0 ÷ 2 signal output pin for buzzer or PWM0 output pin.
AVDD
P
Power supply input pins for A/D circuit
AVREFH
I
ADC highest reference voltage input
AVREFL
I
ADC lowest reference voltage input
DAO
O
7bit DAC output