WM9712L Datasheet, PDF (5/77 Pages) Wolfson Microelectronics plc – AC97 Audio and Touchpanel CODEC

Production Data
WM9712L
PIN DESCRIPTION
PIN
NAME
TYPE
DESCRIPTION
1
DBVDD
Supply
Digital I/O Buffer Supply
2
XTLIN
Digital Input
Clock Crystal Connection 1 / External Clock Input
3
XTLOUT
Digital Output
Clock Crystal Connection 2
4
DGND1
Supply
Digital Ground (return path for both DCVDD and DBVDD)
5
SDATAOUT
Digital Input
Serial Data Output from Controller / Input to WM9712L
6
BITCLK
Digital Output
Serial Interface Clock Output to Controller
7
DGND2
Supply
Digital Ground (return path for both DCVDD and DBVDD)
8
SDATAIN
Digital Output
Serial Data Input to Controller / Output from WM9712L
9
DCVDD
Supply
Digital Core Supply
10
SYNC
Digital Input
Serial Interface Synchronisation Pulse from Controller
11
RESETB
Digital Input
Reset (asynchronous, active Low, resets all registers to their default)
12
WIPER / AUX4
Analogue Input Top Sheet Connection for 5-wire Touchpanels / Auxiliary ADC Input
13
TPVDD
Supply
Touchpanel Driver Supply
14
X+/BR
Analogue Input Touchpanel Connection: X+ (Right) for 4-wire / bottom right for 5-wire
15
Y+/TR
Analogue Input Touchpanel Connection: Y+ (Top) for 4-wire / top right for 5-wire
16
X-/TL
Analogue Input Touchpanel Connection: X- (Left) for 4-wire / top left for 5-wire
17
Y-/BL
Analogue Input Touchpanel Connection: Y- (Bottom) for 4-wire / bottom left for 5-wire
18
TPGND
Supply
Touchpanel Driver Ground
19
PCBEEP
Analogue Input Line Input to analogue audio mixers, typically used for beeps
20
PHONE
Analogue Input Phone Input (RX)
21
MIC1
Analogue Input Left Microphone or Microphone 1 Input
22
MIC2
Analogue Input Right Microphone or Microphone 2 Input
23
LINEINL
Analogue Input Left Line Input
24
LINEINR
Analogue Input Right Line Input
25
AVDD
Supply
Analogue Supply (feeds audio DACs, ADCs, PGAs, mic boost,
mixers)
26
AGND
Supply
Analogue Ground
27
VREF
Analogue Output Internal Reference Voltage (buffered CAP2)
28
MICBIAS
Analogue Output Bias Voltage for Microphones (buffered CAP2 × 1.8)
29
COMP1 / AUX1
Analogue Input Comparator 1 (dead battery alarm) / Auxiliary ADC Input 1
30
COMP2 / AUX2
Analogue Input Comparator 2 (low battery alarm) / Auxiliary ADC Input 2
31
BMON / AUX3
Analogue Input Battery Monitor Input / Auxiliary ADC Input 3
32
CAP2
Analogue In / Out Internal Reference Voltage (normally AVDD/2, if not overdriven)
33
MONOOUT
Analogue Output Mono Output, intended for Phone TX signal
34
SPKGND
Supply
Speaker Ground (feeds output buffers on pins 35 and 36)
35
LOUT2
Analogue Output Left Output 2 (Speaker, Line or Headphone)
36
ROUT2
Analogue Output Right Output 2 (Speaker, Line or Headphone)
37
OUT3
Analogue Output Analogue Output 3 (from AUXDAC or headphone pseudo-ground)
38
SPKVDD
Supply
Speaker Supply (feeds output buffers on pins 35 and 36)
39
HPOUTL
Analogue Output Headphone Left Output
40
HPGND
Supply
Headphone Ground (feeds output buffers on pins 37, 39, 41)
41
HPOUTR
Analogue Output Headphone Right Output
42
AGND2
Supply
Analogue Ground, Chip Substrate
43
HPVDD
Supply
Headphone Supply (feeds output buffers on pins 37, 39, 41)
44
GPIO1
Digital In / Out GPIO Pin 1
45
GPIO2 / IRQ
Digital In / Out GPIO Pin 2 or IRQ (Interrupt Request) Output
46
GPIO3 / PENDOWN Digital In / Out GPIO Pin 3 or Pen Down Output
47 GPIO4 / ADA / MASK Digital In / Out GPIO Pin 4 or ADA (ADC Data Available) Output or Mask input (On
reset, pin level configures device power up status. See Applications
section for external components configuration)
48
GPIO5 / SPDIF_OUT Digital In / Out
GPIO Pin 5 or SPDIF Digital Audio Output
Note: It is recommended that the QFN ground paddle should be connected to analogue ground on the application PCB.
w
PD Rev 4.5 August 2006
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