APLUS INTEGRATED CIRCUITS INC. APC5800E
ꢀ 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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TEL : 886-2-2782-9266
APLUS [ APLUS INTERGRATED CIRCUITS ]
