LC89057W-VF4A-E Datasheet, PDF (11/59 Pages) Sanyo Semicon Device – Digital Audio Interface Transceiver

LC89057W-VF4A-E
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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.
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• _{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.
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• _{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
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or a pull-up resistor to EMPHA/UO/CO and AUDIO/VO.
Table 9.2 Chip Address Settings (Register Connection)
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AUDIO/VO
EMPHA/UO/CO
CAU
CAL
Pull-down
Pull-down
0
0
Pull-down
Pull-up
0
1
Pull-up
Pull-down
1
0
Pull-up
Pull-up
1
1
LC89057W-VF4A-E
EMPHA/UO/CO
AUDIO/VO
CKST/PB
INT
pull-up 10kΩ
Connect to
different circuits
pull-down 10kΩ
Setting Contents of Above Figure
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
Figure 9.2 Setting Example of Function Setting Input Pin
No.7202-11/59