Xenaro – GDP 51…, GDP 6150
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
GRUNDIG Service
3 - 5
PIN NAME
TYPE
DESCRIPTION
1
PWDN
Digital input
Powerdown control; low is ON, high is POWER OFF; Internal pull-down
2
SCKI
Digital input
System clock input (256 or 384fs)
3
TEST
Digital output
Reserved
4
ML/I2S
Digital input
Latch enable (software mode) or input format selection (hardware mode); Internal pull-up
5
MC/IWL
Digital input
Serial control data clock input (software mode) or input word length selection (hardware mode); Internal pull-up
6
MD/DM
Digital input
Serial control data input (software mode) or de-emphasis selection (hardware mode); Internal pull-up
7
RSTB
Digital input
Reset input – active low; Internal pull-up
8
ZERO
Digital output
Infinite zero detect – active low; Open drain type output with active pull-down
9
VOUTR
Analogue output
Right channel DAC output
10
AGND
Supply Analogue
ground supply
11
AVDD
Supply Analogue
positive supply
12
VOUTL
Analogue output
Left channel DAC output
13
CAP
Analogue output
Analogue internal reference
14
BCKIN
Digital input
Audio data bit clock input
15
DIN
Digital input
Serial audio data input
16
LRCIN
Digital input
Sample rate clock input
17
MUTE
Digital IO
Mute control pin, input or automute output; Low is not mute, high is mute, Z is automute
18
MODE
Digital input
Mode select pin; Low is software mode, high is hardware control; Internal pull-down
19
DVDD
Supply Digital
positive supply
20
DGND
Supply Digital
ground supply
SERIAL
INTERFACE
DIGITAL
FILTERS
CONTROL INTERFACE
BCKIN (14)
(9) VOUTR
(12) VOUTL
SIGMA
DELTA
MODULATOR
MUTE/
ATTEN
(20)
DGND
(10)
AGND
(13)
CAP
(11)
AVDD
(19)
DVDD
LRCIN (16)
DIN (15)
(3) TEST
(8) ZERO
256fs/384fs
MUTE
(17)
MODE
(18)
RSTB
(7)
PWDN
(1)
MD/DM
(6)
MC/IWL
(5)
ML/I2S
(4)
SCKI
(2)
DAC
SIGMA
DELTA
MODULATOR
MUTE/
ATTEN
DAC
WM8720
WM8720
16
15
14
20
19
18
17
5
6
7
1
2
3
4
BCKIN
DIN
LRCIN
MUTE
MODE
DGND
DVDD
RSTB
MD/DM
MC/IWL
ML/I2S
TEST
PWDN
SCKI
13
12
11
8
9
10
AVDD
VOUTL
CAP
AGND
VOUTR
ZERO
PIN NAME
TYPE
DESCRIPTION
1
DBVDD
Supply
Digital Buffers VDD
2
BCLK
Digital Input/Output
Digital Audio Port Clock
3
DACDAT
Digital Input
DAC Digital Audio Data Input
4
DACLRC
Digital Input/Output
DAC Sample Rate Clock
5
HPVDD
Supply
Headphone VDD
6
LHPOUT
Analogue Output
Left Channel Headphone Output
7
RHPOUT
Analogue Output
Right Channel Headphone Output
8
HPGND
Ground Headphone
GND
9
LOUT
Analogue Output
Left Channel Line Output
10
ROUT
Analogue Output
Right Channel Line Output
11
AVDD
Supply Analogue
VDD
12
AGND
Ground Analogue
GND
13
VMID
Analogue Output
Mid-rail reference decoupling point
14
MODE
Digital Input
Control Interface Selection, Pull up (on power up only)
15
CSB
Digital Input
3-Wire MPU Chip Select/ 2-Wire MPU interface address selection, active low, Pull up (on power up only)
16
SDIN
Digital Input
3-Wire MPU Data Input / 2-Wire MPU Data Input
17
SCLK
Digital Input
3-Wire MPU Clock Input / 2-Wire MPU Clock Input
18
MCLK
Digital Input
Master Clock Input (MCLK)
19
DCVDD
Supply
Digital Core VDD
20
DGND
Ground
Digital GND
DIGITAL
FILTERS
CONTROL INTERFACE
DAC
DAC
VOL/
MUTE
VOL/
MUTE
H/P
DRIVER
H/P
DRIVER
CSB
SDIN
SCLK
RHPOUT
LHPOUT
ROUT
LOUT
DBVDD
(3.3V)
DGND
+6 to -73dB
1 dB Steps
HPVDD
HPGND
+6 to -73dB
1 dB Steps
DCVDD
(1.5V)
MODE
DIGTAL AUDIO INTERFACE
DACLRC (4)
BCLK (2)
DACDAT (3)
MCLK
AVDD
AGND
VMID
WM8721
(15)
(16)
(17)
(14)
(11)
(13)
(12)
(18)
(19)
(1)
(20)
(5)
(8)
(7)
(10)
(9)
(6)
CLKIN
DIVIDER
(Div x1, x2)
WM8721
1
AVDD
2
AGND
3
4
VMID
5
6
7
8
DCVDD
9
MODE
10
CSB
SDIN
SCLK
MCLK
DGND
DACDAT
DACLRC
BCLK
DBVDD
LHPOUT
HPGND
HPVDD
HPOUT
LOUT
ROUT
11
12
13
14
15
16
17
20
19
18
WM8720
WM8721
