WM8978 Wolfson Microelectronics Ltd., WM8978 Datasheet - Page 5

• Manufacturer Part Number: WM8978
• Description: The WM8978 is a low power, high quality stereo codec designed for portable applications such as Digital still camera or Digital Camcorde
• Manufacturer: Wolfson Microelectronics Ltd.

PIN DESCRIPTION
Preliminary Technical Data
Note:
It is recommended that the QFN ground paddle should be connected to analogue ground on the application PCB.
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PIN
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
1
2
3
6
7
8
9
4
5
CSB/GPIO1
R2/GPIO3
L2/GPIO2
SPKGND
ADCDAT
DACDAT
SPKVDD
MICBIAS
DCVDD
DBVDD
ROUT2
ROUT1
LOUT2
LOUT1
DGND
MODE
AGND
NAME
MCLK
AUXR
OUT4
OUT3
AVDD
BCLK
SCLK
AUXL
VMID
SDIN
LRC
RIP
RIN
LIP
LIN
Digital Input / Output
Digital Input / Output
Digital Input / Output
Digital Input / Output
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue Output
Analogue input
Analogue input
Analogue input
Analogue input
Analogue input
Analogue input
Analogue input
Analogue input
Digital Output
Digital Input
Digital Input
Digital Input
Digital Input
Reference
Supply
Supply
Supply
Supply
Supply
Supply
Supply
TYPE
Left Mic Pre-amp positive input
Left Mic Pre-amp negative input
Right Mic Pre-amp negative input
pin
DAC and ADC Sample Rate Clock
Digital Audio Port Clock
ADC Digital Audio Data Output
DAC Digital Audio Data Input
Master Clock Input
Digital ground
Digital core logic supply
Digital buffer (I/O) supply
3-Wire Control Interface Chip Select / GPIO1 pin
3-Wire Control Interface Clock Input / 2-Wire Control Interface Clock
Input
3-Wire Control Interface Data Input / 2-Wire Control Interface Data Input
Control Interface Selection
Buffered midrail Headphone pseudo-ground, or Right line output or MONO
mix output
Buffered midrail Headphone pseudo-ground, or Left line output
Second right output, or BTL speaker driver positive output
Speaker ground (feeds speaker amp and OUT3/OUT4)
Second left output, or BTL speaker driver negative output
Speaker supply (feed speaker amp only)
Decoupling for ADC and DAC reference voltage
Analogue ground (feeds ADC and DAC)
Headphone or Line Output Right
Headphone or Line Output Left
Analogue supply (feeds ADC and DAC)
Microphone Bias
Left channel line input/secondary mic pre-amp positive input/GPIO2 pin
Right Mic Pre-amp positive input
Right channel line input/secondary mic pre-amp positive input/GPIO3
Left Auxillary input
Right Auxillary input
DESCRIPTION
PTD Rev 2.6 November 2005
WM8978
5