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| 型号： | LA72670BM |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封装： | 14 X 14 MM, QFP-80 |
| 文件页数： | 3/11页 |
| 文件大小： | 332K |
| 代理商： | LA72670BM |
LC89057W-VF4A-E
No.7202-11/59
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 10k
Ω 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
EMPHA/UO/CO
CAU
CAL
Pull-down
0
Pull-down
Pull-up
0
1
Pull-up
Pull-down
1
0
Pull-up
1
Figure 9.2 Setting Example of Function Setting Input Pin
LC89057W-VF4A-E
EMPHA/UO/CO
AUDIO/VO
CKST/PB
INT
Connect to
different circuits
pull-down 10k
Ω
pull-up 10k
Ω
Chip address setting
Demodulation function master
or slave setting
Modulation function or
General-purpose I/O port switch
CAlL=CAU=0
Master
General-purpose I/O function
Setting Contents of Above Figure
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