w681308 Winbond Electronics Corp America, w681308 Datasheet - Page 61

• Manufacturer Part Number: w681308
• Description: Usb Audio Controller
• Manufacturer: Winbond Electronics Corp America

DGND
The shielding of the
USB connector can't
connect to any GND.
C11
10nF
21.
21.1
The application diagram illustrated that the W681308 is a SOC with very low BOM system design. Externally it supports a
variety interfaces such as keypad, LCM, SLIC, SPI flash/EEPROM, Microphone and speakers directly. External 12M Crystal
as well as a 5V to 3.3V linear regulator is required. Ring tone download and playback is through the same Audio DAC path
with a switch for ringing and speech.
PUSHBUTTON
DGND
USB Connector
DJP1
Shielding
S1
S6
S11
S16
S21
GND
VCC
D+
D-
1
2
3
4
1
4
7
*
User
USB_5V
AGND
Typical Application Reference Circuit
USB VoIP speaker phone application
DGND
C12
51pF
DGND
PUSHBUTTON
S2
S7
S12
S17
S22
DGND
C13
51pF
2
5
8
0
Melody
R9
R10
25
25
C14
30pF
UARTT
UARTR
DGND
DGND
DGND
VDD_3.3V
DGND
30pF
C15
S3
S8
S13
S18
S23
VDD_3.3V
VDD_3.3V
VDD_3.3V
C4
33pF
C7
33pF
Figure 16 W681308 Reference Design Application Circuit
3
6
9
#
Up1
DY1
12M
R11
100
R12
100
LCD Module (Serial Interface)
C17
100nF
R7
270
DGND
DGND
C9
100nF
R8
1M
DGND
S4
S9
S14
S19
S24
D1
LED
D2
LED
Mode
Up
Skype
Left
Down1
DGND
DGND
C8
10nF
UARTT
UARTR
XTALO
XTALI
DN
DP
GPIO3
GPIO0
XXXX PRODUCT DESCRIPTION
10
11
12
1
2
3
4
5
6
7
8
9
UA
UA
DGND
XTALO
XTALI
VDDL
DVDD
DN
DP
DGND
GPIO3
GPIO0
RTT
RTR
DGND
S5
S10
S15
S20
S25
61
HangUp
Down
Dial
Right
Mute
W681308_LQFP
U1
AGND
VREF1
VREF2
RGND
AGND
AGND
AVDD
EARN
EARP
C16
100nF
MCO
MCP
SPN
SPP
PCM interface is for
External Audio Device or
USB ATA wtih Pro-X
36
35
34
33
32
31
30
29
28
27
26
25
R1
1M
VREF1
VREF2
MCP
MCO
RGND
SPP
EARP
EARN
SPN
AGND
1
AGND
TP1
C10
100nF
AGND
C5 100nF
C6 100nF
Q3
R2
100K
MMBT3904
R6
2K
VDD_3.3V
VDD_3.3V
R4
300K
AGND
AGND
1
MMBT3906
Q1
C2
10nF
REC1
AGND
W681308
Rev1.2
R3
60K
R5
100K
1
2
USB_5V
MIC1
AGND
SPK1
Q2
C3
PZT2222A
220uF/10V
DGND
+
C1
1uF/10V
VDD_3.3V