SN8P1602A datasheet(67/76 Pages) SONIX

67 / 76 page

SN8P1602B

8-Bit Micro-Controller

SONiX TECHNOLOGY CO., LTD

Page 67

Version 1.1

PROGRAM CHECK LIST

Item

Description

Undefined Bits

All bits those are marked as “0” (undefined bits) in system registers should be set “0” to avoid

unpredicted system errors.

Interrupt

Do not enable interrupt before initializing RAM.

Non-Used I/O

Non-used I/O ports should be set as output low mode or pull-up at input mode to save

current consumption.

Sleep Mode

Enable on-chip pull-up resistors of port 0 and port 1 to avoid unpredicted wakeup.

Stack Buffer

Be careful of function call and interrupt service routine operation. Don’t let stack buffer

overflow or underflow.

System Initial

Write 0x7F into STKP register to initial stack pointer and disable global interrupt

Clear all RAM.

Initialize all system register even unused registers.

Noisy Immunity

Enable OSG and High_Clk / 2 code option together

Enable noise filter code option in SN8P1602B.

Enable the watchdog option to protect system crash.

Non-used I/O ports should be set as output low mode

Constantly refresh important system registers and variables in RAM to avoid system

crash by a high electrical fast transient noise.

Disable Low Power Function

SN8P1602A 데이터시트(PDF) 67 Page - SONiX Technology Company