Owner manual

APLUS INTEGRATED CIRCUITS INC. APC5890
www.aplusinc.com.tw TEL : [phone]
3
2. PIN DESCRIPTION :
P
IN NAME I/O DESCRIPTION
RESET I RESET INPUT. ACTIVE LOW.
PWM1,PWM2 O PWM OUTPUT.
DAC O OUTPUT FROM D/A CONVERTER.
XOSC1 I CRYSTAL OSCILLATOR INPUT PIN.
XOSC2 O CRYSTAL OSCILLATOR OUTPUT PIN.
CAP I CAPACITOR FOR PLL CIRCUIT.
PA0-PA7 I/O
I/O PORT_A PIN 0 TO 7. ALSO AS EXTERNAL INTERRUPT
SOURCE.(FALL EDGE TRIGGER), INTERNAL PULL HIGH.
PA8-PA12 IO I/O PORT_A PIN 8 TO 12, INTERNAL PULL HIGH.
PA13/ADC I/O
I/O PORT_A PIN 13 OR ANALOG SIGNAL INPUT.INTERNAL PULL LOW.
PA14 I/O I/O PORT_A PIN 14, INTERNAL PULL HIGH.
PA15 I/O I/O PORT_A PIN 15, INTERNAL PULL HIGH.
PB0-PB5/BANK3-BANK8 O PORT_B OR EXTERNAL MEMORY BANK SELECT
PB6/EMEMRD O
PORT_B PIN 6 OR EXTERNAL RAM READ
(ACTIVE LOW).
PB7/EXTRAM O
PORT_B PIN 7 OR EXTERNAL RAM SELECT PIN
(ACTIVE LOW)
PB8/EMEMWRL I/O
Port_b pin 8 or External RAM low byte write(Active Low),
Input at reset cycle, output at normal cycle, internal pull high
.
PB9/EXTIRQ I/O
Port_b pin 9 or External IRQ input pin(rise edge trigger),
Input at reset cycle, output at normal cycle, internal pull low.
PB10/EMEMWRH O
Port_b pin 10 or External RAM high byte write(Active Low),
Input at reset cycle, output at normal cycle, Internal pull low.
PB11/EXTROMCS I/O
PORT_B PIN 11 ROM SELECT OR EXTERNAL ROM CHIP
SELECT
(ACTIVE LOW), INPUT AT RESET CYCLE, OUTPUT
AT NORMAL OPERATION ,CYCLE, INTERNAL PULL HIGH.
PC/EMEMAD I/O
EMEMAD: EXTERNAL MEMORY ADDRESS/DATA
IF IT IS ADDRESS THEN EMEMA0~EMEMA12 IS A1~A13.
EMEMA13~EMEMA15 IS BANK0~BANK2.
ALE I/O
EXTERNAL MEMORY ADDRESS LATCH ENABLE.
I
NPUT AT RESET CYCLE,OUTPUT AT NORMAL OPERATION
CYCLE
, INTERNAL PULL HIGH.
VDD1-VDD4 I DIGITAL POWER INPUT.
GND1-GND4 I DIGITAL GROUND.
PLLVDD,PLLGND I POWER AND GROUND FOR PLL CIRCUIT.
DACVDD,DACGND I POWER AND GROUND FOR DAC CIRCUIT.