wm8802scft/v Wolfgang Knap, wm8802scft/v Datasheet - Page 11

• Manufacturer Part Number: wm8802scft/v
• Description: Digital Audio Interface Transceiver
• Manufacturer: Wolfgang Knap

Product Preview
CHIP ADDRESS SETTINGS (EMPHA/UO, AUDIO /VO)
w
Table 2 Chipset Address Settings
Figure 4 Function Setting Input Pin Setting Example
The WM8802 comes with a function to set a unique chip address to allow the use of several
WM8802 on the same micro-controller bus.
A 10k
settings. This allows up to set 4 chip addresses.
Chip addresses in the micro-controller interface can be set with CAL and CAU provided that they are
first two bits on the LSB side. CAL and CAU corresponds to the lower and higher chip address
respectively.
Address writing to a particular device is enabled by making the chip address setting, using
EMPHA/UO and AUDIO /VO, the same as the chip addresses sent from the micro-controller.
The chip address setting must be performed even when using only one WM8802 in the system. The
chip address is undefined and control from the micro-controller cannot be performed if the chip
address setting is not performed. While XMODE is Low and the micro-controller is not used the state
of the chip address setting pin is undefined,. Be sure to connect either A pull-down resistor or a pull-
up resistor should be connected to EMPHA/UO and AUDIO /VO.
Notes:
1.
2.
3.
Chip address setting
Demodulation function master or slave setting
Modulation function or general purpose I/O port switch => General purpose I/O port
AUDIO /VO
Pull-down
Pull-down
Pull-up
Pull-up
pull-down or pull-up resistor is used to set EMPHA/UO and AUDIO /VO as the chip address
WM8802
AUDIO/VO
EMPH/UO
CKST
INT
EMPHA/UO
Pull-down
Pull-down
Pull-up
Pull-up
Pull-up 10k
Pull-down 10k
CAU
0
0
1
1
=> CAL = CAU = 0
=> Master
External
Circuit
function
PP Rev 1.1 April 2004
CAL
0
1
0
1
WM8802
11