Marantz ST7001 Service Manual page 23

IC807 : PCM1791ADB
LRCK 1 28 MS
BCK 2 27 MC
DATA 3 26 MDI
MUTE MDO
4 25
SCK 24 MSEL
5
RST 23 ZEROL
6
V 7 22 ZEROR
DD
DGND 8 21 V F
CC
AGNDF 9 20 V L
CC
V R 10 19 AGNDL
CC
AGNDR V
11 18
OUT
V R− V
12 17
OUT OUT
V R+ 16 AGNDC
13
OUT
V 15 V C
14
COM CC
TERMINAL
I/O I/O
NAME PIN
AGNDC 16 − Analog ground (internal bias and current DAC)
AGNDF 9 − Analog ground (DACFF)
AGNDL 19 − Analog ground (L-channel I/V)
AGNDR 11 − Analog ground (R-channel I/V)
Bit clock input (1)
BCK 2 I
Serial audio data input (1)
DATA 3 I
DGND 8 − Digital ground
Left and right clock (f S ) input (1)
LRCK 1 I
Mode control clock input (1)
MC 27 I
Mode control data input (2)
MDI 26 I/O
Mode control readback data output (3)
MDO 25 O
Mode control chip select input (4)
MS 28 I/O
I 2 C/SPI select (1)
MSEL 24 I
Analog output mute control (1)
MUTE 4 I
Reset (1)
RST 6 I
System clock input (1)
SCK 5 I
V CC C 15 − Analog power supply (internal bias and current DAC), 5 V
V CC F 21 − Analog power supply (DACFF), 5 V
V CC L 20 − Analog power supply (L-channel I/V), 5 V
V CC R 10 − Analog power supply (R-channel I/V), 5 V
V COM 14 − Internal bias decoupling pin
V DD 7 − Digital power supply, 3.3 V
V OUT L+ 17 O L-channel analog voltage output +
V OUT L– 18 O L-channel analog voltage output –
V OUT R+ 13 O R-channel analog voltage output +
V OUT R– 12 O R-channel analog voltage output –
ZEROL 23 O Zero flag for L-channel
ZEROR 22 O Zero flag for R-channel
(1) Schmitt-trigger input, 5-V tolerant
(2) Schmitt-trigger input and output. 5-V tolerant input. In I 2 C mode, this pin becomes an open-drain 3-state output; otherwise, this pin is a CMOS
output.
(3) 3-state output
(4) Schmitt-trigger input and output. 5-V tolerant input and CMOS output
L−
L+
DESCRIPTIONS DESCRIPTIONS
29
FUNCTIONAL BLOCK DIAGRAM
LRCK
Audio
BCK
Data Input
DATA I/F
8
MUTE
Oversampling
Advanced
Digital
RST
Segment
Filter
DAC
MSEL and
Modulator
Function
Control
MDO
MDI
Function
Control
MC
I/F
MS
ZEROL
System
Zero
Clock
ZEROR Power Supply
Detect
Manager
Current
V OUT L−
Segment
DAC
V OUT L+
and
I/V Buffer
D/S and Filter
Bias
V COM
and
Vref
Current
V OUT R+
Segment
DAC
V OUT R−
and
I/V Buffer
D/S and Filter
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