LC89057W-VF4A-E
___________
9.2 Chip Address Settings (EMPHA/UO/CO, AUDIO/VO)
•
•
•
•
•
The LC89057W-VF4A-E comes with a function to set a unique chip address to allow the use of several LC89057W-
VF4A-E on the same microcontroller interface bus.
____________
In chip address setting, connect a 10kΩ pull-down or pull-up resistor to EMPHA/UO/CO and AUDIO/VO. By this
setting, 4 kinds of chip addresses can be set at a maximum.
Chip addresses in the microcontroller interface are set with CAL and CAU provided as the first two bits on the LSB
side. CAL corresponds to the lower chip address and CAU to the higher chip address.
____________
Command writing is enabled by making the chip address settings with EMPHA/UO/CO and AUDIO/VO identical to
the chip addresses sent from the microcontroller.
The chip address setting is required even when only one LC89057W-VF4A-E is used in the system. If the chip address
is not set, the chip address is undefined and the microcontroller cannot control the system. When the microcontroller is
not used, a chip address-setting pin is input open while XMODE is "L". Be sure to connect either a pull-down resistor
____________
or a pull-up resistor to EMPHA/UO/CO and AUDIO/VO.
Table 9.2 Chip Address Settings (Register Connection)
_____
AUDIO/VO
Pull-down
Pull-down
Pull-up
EMPHA/UO/CO
Pull-down
Pull-up
CAU
CAL
0
0
1
1
0
1
0
1
Pull-down
Pull-up
Pull-up
LC89057W-VF4A-E
pull-up 10kΩ
EMPHA/UO/CO
AUDIO/VO
CKST/PB
INT
Connect to
different circuits
pull-down 10kΩ
Setting Contents of Above Figure
Chip address setting
CAlL=CAU=0
Master
General-purpose I/O function
Demodulation function master
or slave setting
Modulation function or
General-purpose I/O port switch
Figure 9.2 Setting Example of Function Setting Input Pin
No.7202-11/59
SANYO [ SANYO SEMICON DEVICE ]
