SN8A1702AX datasheet(104/112 Pages) SONIX

104 / 112 page

Preliminary

SN8P1702A/SN8P1703A

8-bit micro-controller build-in 12-bit ADC

SONiX TECHNOLOGY CO., LTD

Page 104

Revision 0.5

PROGRAM CHECK LIST

Item

Description

Pull-up Resister

Use PnUR register to enable or disable on-chip pull-up resisters. Refer I/O port chapter for

detailed information.

Undefined Bits

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

unpredicted system errors.

ADC

Set ADC input pin I/O direction as input mode and disable pull-up resister of ADC input pin

PWM0

Set PWM0 (P5.4) pin as output mode.

PWM1

Set PWM1 (P5.3) pin as output mode.

Interrupt

Do not enable interrupt before initializing RAM.

Non-Used I/O

Non-used I/O ports should be pull-up or pull-down in input mode, or be set as low in output

mode to save current consumption.

Sleep Mode

Enable on-chip pull-up resisters 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 the watchdog option and internal RC for the watchdog clock to protect system

crash.

Non-used I/O ports should be set as output low mode or input with pull-up resistors.

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

crash by a high electrical fast transient noise.

SN8A1702AX Datasheet(PDF) 104 Page - SONiX Technology Company

SN8A1702AX Datasheet(HTML) 104 Page - SONiX Technology Company

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL