Owner manual

APLUS INTEGRATED CIRCUITS INC. APC5890
www.aplusinc.com.tw TEL : [phone]
6
z 3FE0 System control 0. Write only. :
3FE0
0 1
BIT - 0 MUST 0 = PA14,PA15 ARE IO PINS(DEFAULT).
BIT - 1 PB9 IS IO PIN(DEFAULT). PB9 IS EXTIRQ PIN.
BIT - 2 PB7 IS IO PIN(DEFAULT). PB7 IS EXTRAMCS.
BIT - 3
ADC DISABLE, PA13 IS IO
PIN
(DEFAULT).
ADC ENABLE, PA13 IS ADC PIN.
BIT - 4 NO USE(MUST 0)
BIT - 5 NO USE(MUST 0)
BIT - 6 PWM DISABLE(DEFAULT). PWM ENABLE.
BIT - 7 DAC DISABLE(DEFAULT). DAC ENABLE.
z 3FE1 System Control 1. Write only.
3FE1
0 1
BIT - 0
TIMER A CLOCK SELECT
32.768K HZ.(DEFAULT)
TIMER A CLOCK SELECT SYSTEM
CLOCK
.
BIT - 1 NO USE(MUST 0)
BIT - 2 TIMER A DISABLE.(DEFAULT) TIMER A ENABLE.
BIT - 3 TIMER B DISABLE.(DEFAULT) TIMER B ENABLE.
BIT - 4
TIMER A INTERRUPT
DISABLE
.(DEFAULT)
TIMER A INTERRUPT ENABLE.
BIT - 5 TIMER B NMI DISABLE.(DEFAULT)TIMER B NMI ENABLE.
BIT - 6
SYSTEM CLOCK = PLL
CLOCK
(DEFAULT).
SYSTEM CLOCK = 32768HZ.
BIT - 7 WATCHDOG TIMER DISABLE.
WATCHDOG TIMER
ENABLE
.(DEFAULT)
z 3FE2 System control 2. Write only.
3FE2
0 1
BIT - 0
=1 Æ ENTRY STAND-BY MODE. IN STAND-BY MODE, HOLD CPU
.
THE NMI AND IRQ WILL WAKE UP THE CPU.
BIT - 1
=1 Æ ENTRY SLEEP MODE. IN SLEEP MODE , THE BOTH OF MAIN
SYSTEM CLOCK AND
32768HZ WILL BESTOPPED, SO ALL
FUNCTION ARE STOPPED AND ONLY EXTERNAL INTERRUP
T
CAN WAKE UP THIS CHIP