APC5860 datasheet(8/10 Pages) APLUS

8 / 10 page

APLUS INTEGRATED CIRCUITS INC.

APC5860

www.aplusinc.com.tw

TEL : 886-2-2782-9266

3FEA : BANK REGISTER FOR COPROCESSOR. WRITE ONLY.

3FEB : BANK REGISTER MSB BIT FOR COPROCESSOR. WRITE ONLY.

BANK REGISTER IS 9 BITS REGISTER($3FEB BIT0, $3FEA BIT7-0). THE MEMORY RANGE OF

BANK IS FROM

$4000 TO $7FFF.

BIT 7-1 : RESERVED.

3FEC,3FED : TIMER A DATA OR TONE0 GENERATOR. READ AND WRITE. AFTER TIMER_A BE

ENABLED

, THE TIMER WILL START TO COUNT DOWN. WHEN TIMER COUNTS TO ZERO, THE

TIMER WILL COUNT FROM THE INITIAL VALUE AND TIMER

_A IRQ WILL BE HAPPEN.

THE TIME ELAPSE = (($3FED,$3FEC)+1) / (TIMER A INPUT CLOCK).

3FEE : TIMER B LOW BYTE DATA. READ AND WRITE.

3FEF : TIMER B HIGH BYTE DATA. READ AND WRITE.

AFTER TIMER_B BE ENABLED, THE TIMER WILL START TO COUNT DOWN. WHEN TIMER COUNTS

TO ZERO

,THE TIMER WILL COUNT FROM THE INITIAL VALUE AND TIMER_B NMI WILL BE

HAPPEN

THE TIME ELAPSE = (($3FEF,$3FEE)+1) / (TIMER B INPUT CLOCK).

3FF0 : PORT_A[15..8] DIRECTION REGISTER. WRITE ONLY.

AN ‘1’ IN THIS REGISTER WILL SET THE CORRESPONDING PIN OF PORT_A TO BE OUTPUT.

THE DEFAULT VALUE FOR EACH BIT IS ZERO.

3FF1 : PORT_A[15..8] DATA REGISTER. READ AND WRITE.

3FF2: PORT_B[11..8] DATA REGISTER. WRITE ONLY.

BIT 3-0: PORT_B PIN 11 TO PIN 8.

BIT 7-4 : RESERVED.

3FF4 : BANK REGISTER FOR CPU. WRITE ONLY.

3FF5 : BANK REGISTER MSB BIT FOR CPU. WRITE ONLY.

BANK REGISTER IS 9 BITS REGISTER($3FF5 BIT0, $3FF4 BIT7-0).

THE MEMORY RANGE OF BANK IS FROM $4000 TO $7FFF.

BIT 1: RESERVED.

BIT 2: = 1 VOICE0 BUFFER BE TRANSFERRED TO DAC PORT DIRECTLY.(DEFAULT)

= 0 VOICE0 BUFFER WILL BE TRANSFERRED TO DAC PORT WHEN TIMER_B NMI HAPPEN.

BIT 7-3 : RESERVED.

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