Sharp DV-550U Service Manual page 46

DV-550U
12-10. IC801~803
12-10-1. Explanation of terminals
Pin No. Terminal name
1 NC
2 SCKI
3 TEST
4 ML
5 MC
6 MD
7 RSTB
8 ZERO
9 VOUTR
10 AGND
11 VCC
12 VOUTL
13 CAP
14 BCKIN
15 DIN
16 LRCIN
17 TEST
18 NC
19 VDD
20 DGND
*1: Internal pull-up provided. Schmidt trigger input.
*2: Schmidt trigger input.
12-10-2. Block Diagram
BCKIN
LRCIN
DIN
ML
MC
MD
RSTB
AUDIO D/A CONVERTER
I/O
Not connected.
–
System clock input. (256fs/384fs)
I
– Not connected. Be sure to open.
Control data input. Enable terminal. *
I
Control data input. Bit clock terminal . *
I
Control data input. Data terminal . *
I
Reset input terminal. Active "L" *
I
Infinity zero flag output terminal. Open drain.
O
Rch analog voltage output terminal .
O
– Analog GND terminal.
Analog power terminal.
–
Lch analog voltage output terminal .
O
Internal bias decouple terminal
–
I Audio data. Bit clock input terminal. *
Audio data. Data input terminal. *
I
I
Audio data. Reference sampling clock input terminal. *
– Connect to GND.
–
Not connected. Be sure to open.
–
Digital power terminal.
– Digital GND terminal.
Serial
Input
8X Oversampling
I/F
Digital Filter
Function Controller
Mode
Control
I/F
256fs/384fs
SCKI
Operation function
1
2
Multi. -level·
Delta/Sigma
Modulator
Multi. -level·
with
Delta/Sigma
Modulator
BPZ-Cont.
Power Supply.
VCC AGND
12-19
1
1
1
2
2
VOUTL
Low-pass
DAC
Filter
CAP
Low-pass
VOUTR
DAC
Filter
ZERO
Open drain
VDD CGND