NAD C 542, Service Manual

Page: 22 / 36

INPUT
Port 3
Counter
Timers (2)
Interrupt
Control
Two Analog
Comparators
Port 2
I/O
(Bit Programmabel)
1
P24
P25
P26
P27
P28
XTAL 2
XTAL 1
P31
P32
P23
P22
P21
P20
GND
P02
P01
P00
P33
18
9 10
I/O
Vcc
ALU
OTP
Program
Counter
Machine
Timing & Inst.
Control
FLAG
Flegister
Pointer
General-Purpose
Register File
Port 0
GND
XTAL
- 22 -
OUT
IN
GND
MAIN BOARD
U501, U506, U507: 78XX
1 28 ML/I
2
S LRCIN
2 27 MC/DEM DIN
3 26 MD/FSS
BCKIN
Serial
Input
I/F
Mode
Control
I/F
SCK
BPZ Control
Crystal/OSC
XTI XTO CLKO VCC1 AGND1 VDD DGND
Power Supply
Power-On Reset
HDCD
8X
Oversampling
Digital Filter with
Enhanced
Multi-level
Delta Signal
Modulator
DAC
Low-pass
Filter
VOUTL
V
CC
2L
AGND2L V
CC
2R
AGND2R
EXTL
VOUTR
EXTR
ZERO
Low-pass
Filter
DAC
LRCIN
DIN
MUTE
RST
MODE
CS/IWO
MD/FSS
MC/DEM
ML/I
2
S
BCKIN
4 25 MUTE
CLKO
5 24 MODE
XTI
6 23 CS/1WO XTO
7
PCM1732U
22 RST DGND
8 21
20
ZERO VDD
9
GAIN HDCD
10 19 VCC2L
VCC2R
11 18 AGND2L
AGND2R
12 17
EXTL
EXTR
13 16 VOUTL VOUTR
14 15 VCC1 AGND1
HDCD
Hidden
Code
Recovery
HDCD
Amplitude
Decoding
MAIN BOARD
U302: PCM1732
MAIN BOARD
U402: NADLINK (MASKED)