Rainbow Electronics APC5890 - Manual

APLUS INTEGRATED CIRCUITS INC.
APC5890
www.aplusinc.com.tw TEL : 886-2-2782-9266 1
APC5890 DE-COMPRESSION VOICE IC
1. CHIP FEATURES.
z D
UAL OPERATION FREQUENCIES
:
- 32.768 KH Z & 0.5 SECOND TIMER INTERRUPT .
- B UILT - IN PLL CIRCUIT TO GENERATE SYSTEM CLOCK MAX 20MH Z .
z B UILT - IN 2K BYTES (1K*16) RAM.
z A
DDRESS UP TO
8M
BYTE
(4M*16) RAM
OR
ROM
OR
“ROM
AND
RAM”
B UILT - IN 16K BYTE (8K*16) PROGRAM ROM AND 1.5M BYTE (768K*16) DATA ROM
z B
UILT
-
IN DECOMPRESSION ENGINE
T
HE
VOICE
DE
-
COMPRESSION RATE IS AS THE FOLLOWS
:
- 3.6 KBIT / SEC - 4.8 KBIT / SEC - 6.0 KBIT / SEC - 7.2 KBIT / SEC - 8.4 KBIT / SEC - 9.6 KBIT / SEC -
10.8 KBIT / SEC - 12.0 KBIT / SEC - 13.2 KBIT / SEC - 14.4 KBIT / SEC
DE
-
COMPRESSION
RATE
VOICE DURATION
DE
-
COMPRESSION
RATE
VOICE DURATION
3.6
K BIT
/
SEC
56.89 min. 9.6
K BIT
/
SEC
21.33 min.
4.8 K BIT / SEC 42.67 min. 10.8 K BIT / SEC 18.96 min.
6.0
K BIT
/
SEC
34.13 min. 12.0
K BIT
/
SEC
17.07 min.
7.2
K BIT
/
SEC
28.44 min. 13.2
K BIT
/
SEC
15.52 min.
8.4 K BIT / SEC 24.38 min. 14.4 K BIT / SEC 14.22 min.
T
HE
MUSIC
DE
-
COMPRESSION RATE IS AS THE FOLLOWS
:
DE
-
COMPRESSION
RATE
VOICE DURATION
DE
-
COMPRESSION
RATE
VOICE DURATION
10
K BIT
/
SEC
20.48 min. 18
K BIT
/
SEC
11.38 min.
12 K BIT / SEC 17.07 min. 20 K BIT / SEC 10.24 min.
14
K BIT
/
SEC
14.63 min. 22
K BIT
/
SEC
9.31 min.
16
K BIT
/
SEC
12.80 min. 24
K BIT
/
SEC
8.53 min.
z B
UILT
-
IN
12
BITS
D/A, 8
BITS
ADC.
z I/O
PORTS
16 I/O
PINS FOR PORT A
.
12
OUTPUT FOR PORT B
.
16 I/O PINS FOR PORT C .