SMBP2501BPB datasheet(10/107 Pages) SONIX

10 / 107 page

SN8P2501B

8-Bit Micro-Controller

SONiX TECHNOLOGY CO., LTD

Page 10

Version 2.1

1.4 PIN DESCRIPTIONS

PIN NAME

TYPE

DESCRIPTION

VDD, VSS

Power supply input pins for digital circuit.

P1.1/RST/VPP

I, P

P1.1: Input only pin (Schmitt trigger) if disable external reset function.

P1.1 without build-in pull-up resister.

P1.1 is input only pin without pull-up resistor under P1.1 mode. Add the 100 ohm

external resistor on P1.1, when it is set to be input pin.

Built-in wakeup function.

RST: System reset input pin. Schmitt trigger structure, low active, normal stay to

“high”.

VPP: OTP programming pin.

P1.3/XIN

I/O

Port 1.3 bi-direction pin. Schmitt trigger structure as input mode.

Built-in pull-up resisters.

Built-in wakeup function.

XIN: Oscillator input pin while external oscillator enable (crystal and RC).

P1.2/XOUT

I/O

Port 1.2 bi-direction pin. Schmitt trigger structure as input mode.

Built-in pull-up resisters.

Built-in wakeup function.

XOUT: Oscillator output pin while external crystal enable.

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.

P1.0

I/O

Port P1.0 bi-direction pins and open-drain pin. Schmitt trigger structure as input

mode.

Built-in pull-up resisters.

P2 [5:0]

I/O

Bi-direction pins. Schmitt trigger structure as input mode.

Built-in pull-up resisters.

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 and PWM output pin.

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