W6810DK Nuvoton Technology Corporation of America, W6810DK Datasheet - Page 23

• Manufacturer Part Number: W6810DK
• Description: KIT DEV/EVAL FOR W6810
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W6810DK

• Main Purpose: Audio, CODEC
• Embedded: No
• Utilized Ic / Part: W6810
• Primary Attributes: Mono, PCM, 8-Bit
• Secondary Attributes: ADC and DAC Filtering Compliant with ITU G.712
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

W6810/W681310 Conversion to W681513
The W6810DK has to be modified to allow the demonstration of the W681513 because
of the 2.000 MHz clock rather than the 2.048 MHz standard frequency. The W681xxx-
DK board is designed to divide 2048 KHz by 256 to get the 8 KHz sample clock. For the
W681513 we substitute a 4.000 MHz crystal on the board and then build an external
divider to do the divide by 250 to get 8 KHz again. It is a fairly simple modification
requiring the addition of two divider chips on the prototyping area of the board. Follow
these steps.
WECA
2727 N First Street, San Jose CA 95134
1. Change Y1 to 4.000 MHz.
2. Make Cuts at U4-9 and U5-4.
3. Add Jumper connecting U5-3 to U3-3.
4. Add Ripple counter circuit (See below external circuit on the bread board
area) to breadboard area and connect as shown.
10
11
12
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
Vref
RO-
PAI
PAO-
PAO+
VDDA
NC
VDDD
FSR
PCMR
BCLKR
PUI
U2
Figure 2
Vref
RO-
PAI
PAO-
PAO+
VDD
FSR
PCMR
BCLKR
PUI
U1
W6811
BCLKT
VSSD
PCMT
MCLK
VSSA
VAG
BCLKT
FST
U/A
PCMT
MCLK
AI+
NC
AO
AI-
VAG
VSS
FST
U/A
AI+
AO
AI-
24
23
22
21
20
19
18
17
16
15
14
13
W6810
20
19
18
17
16
15
14
13
12
11
W681xxxDK
23