Rainbow Electronics APC5890 - Manual (Page 9)

APLUS INTEGRATED CIRCUITS INC.
APC5890
www.aplusinc.com.tw TEL : 886-2-2782-9266 9
z 3FF6 : P ORT _ C [7..0] DATA REGISTER . R EAD AND WRITE .
z 3FF7 : P ORT _ C [15..8] DATA REGISTER . R EAD AND WRITE .
z 3FF8: P
ORT
_
C
[7..0]
DIRECTION REGISTER
. W
RITE ONLY
.
A N ‘1’ IN THIS REGISTER WILL SET THE CORRESPONDING PIN OF PORT _ C TO BE OUTPUT .
T HE DEFAULT VALUE FOR EACH BIT IS ZERO .
z 3FF9: P ORT _ C [15..8] DIRECTION REGISTER . W RITE ONLY .
A
N
‘1’
IN THIS REGISTER WILL SET THE CORRESPONDING PIN OF PORT
_
C TO BE OUTPUT
.
T
HE DEFAULT VALUE FOR EACH BIT IS ZERO
.
z 3FFA :ADC
REGISTER
. R
EAD ONLY
.
W HEN THE TIMER B NMI OCCURS , THE A/D CONVERSION PROCESS STARTS AND THE S/H
CIRCUIT STOP SAMPLING AND BEGIN HOLDING IT UNTIL THE ADC PROCESS IS FINISHED .
T
HE
ADC
INT WILL GENERATE WHEN
ADC
PROCESS IS FINISHED
.
z 3FFB,3FFC :….
NO USE
z 3FFD : ……
NO USE
z 3FFE: V
OICE CHANNEL
1
LOW BYTE AND SYSTEM CONTROL
3. W
RITE ONLY
.
3FFE 0 1
BIT - 0 S
EPARATE MODE FOR
DAC
OUTPUT
(
DEFAULT
)
M
IX MODE FOR
DAC
OUTPUT
.
BIT - 1 S EPARATE MODE FOR PWM
OUTPUT ( DEFAULT )
M IX MODE FOR PWM OUTPUT
BIT - 2
NO USE
(
MUST
0)
BIT - 3 NO USE ( MUST 0)
BIT – 7 ~ 4 VOICE CHANNEL 1 LOW NIBBLE BYTE .
z 3FFF : V
OICE CHANNEL
1
HIGH BYTE
. W
RITE ONLY
.
T HE RESOLUTION OF VOICE CHANNEL 1 IS 12 BITS ($3FFF,$3FFE BIT 7_4). T HIS REGISTER
WILL BE TRANSFERRED TO
PWM
PORT WHILE TIMER
_
B
NMI
HAPPEN IN SEPARATE MODE
.