Sharp DV-550U, Service Manual

Page: 46 / 84

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