WM8746
Production Data
PIN DESCRIPTION
PIN
1
NAME
DVDD
SCKI
TYPE
Supply
DESCRIPTION
Digital Positive Supply.
System Clock Input
2
Digital input
Digital input
Digital input
Digital input
Digital input
Digital input
Digital input
Internal pull-up
3
BCKIN
LRCIN
DIN0
Audio Data Bit Clock Input.
DAC Sample Rate Clock Input
4
5
Channel 0 Serial Audio Data Input.
Channel 1 Serial Audio Data Input.
Channel 2 Serial Audio Data Input.
Control Method Selection Pin.
Low = Software Mode
6
DIN1
7
DIN2
8
MODE
High = Hardware Control Mode
9
MUTE
Digital bidirectional Mute Control Pin in PCM Mode.
Input
Output (Automute Enabled)
Low: Not Mute
High: Mute
Z: Automute
Low: Mute Off
High: Mute On (Zero Flag)
10
LRCIN2
Digital input
Internal pull-down
Supply
2nd LRCIN for use in mixed 192kHz/96kHz operation (bit 2SPD = ‘hi’)
11
12
DGND
ML/I2S
Digital GND
Digital input
Software mode: 3-Wire Serial Control Latch
Hardware Mode: Input Format Selection:
Internal pull-up
13
14
MC/IWL
MD/DM
Digital input
Software Mode: 3-Wire Serial Control Clock Input
Hardware mode: Input Word Length Selection:
Internal pull-up
Digital input
Software mode: 3-Wire Serial Control Data Input
Hardware mode: De-emphasis selection
Analogue Positive DAC Reference
Analogue Internal Mid-Rail Reference De-Coupling Point
Left Channel 2 Output.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
AVDD2
CAP
Supply
Analogue output
Analogue output
Analogue input
Analogue output
Supply
OUT2L
GR2
Channel 2 Negative Reference.
Right Channel 2 Output.
OUT2R
AGND1
OUT1L
GR1
Analogue GND
Analogue output
Analogue input
Analogue output
Supply
Left Channel 1 Output.
Channel 1 Negative Reference.
Right Channel 1 Output.
OUT1R
AGND2
OUT0L
GR0
Analogue GND
Analogue output
Analogue input
Analogue output
Supply
Left Channel 0 Output.
Channel 0 Negative Reference.
Right Channel 0 Output.
OUT0R
AVDD1
Analogue VDD
Note:
1. Digital input pins have Schmitt trigger input buffers
March 2006, PD Rev 4.0
w
4
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
