LC89057W-VF4A-E SANYO [Sanyo Semicon Device], LC89057W-VF4A-E Datasheet - Page 12

• Manufacturer Part Number: LC89057W-VF4A-E
• Description: Digital Audio Interface Transceiver
• Manufacturer: SANYO [Sanyo Semicon Device]

9.3 Demodulation Function Master/Slave Settings (
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9.4 Switching between Modulation Function and General-Purpose I/O Port (
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A master/slave function that allows multi-channel synchronized transfer using multiple LC89057W-VF4A-E ICs is
Set to the master mode normally, when single LC89057W-VF4A-E IC is used. When multiple LC89057W-VF4A-E
In the multi-channel synchronous transfer mode using multiple LC89057W-VF4A-E ICs, connect RBCK and RLRCK
If the input data sampling frequency or the phase are different between the master mode and slave mode or if the clock
The modulation function and the general-purpose I/O function share same pins. Therefore, these two functions cannot
be used simultaneously.
To switch functions, connect either a 10kΩ pull-down or pull-up resistor to
included. For this setting, connects either a 10kΩ pull-down or a pull-up resistor to
ICs are used, set one of them to the master mode and the others to the slave mode.
(output) on the master side to RBCK and RLRCK (input) on the slave side. Also connect XMCK on the master side to
XIN on the slave side. At this time, the polarity of RBCK and RLRCK, and the frequency of XIN and XMCK must be
identical.
sources differ while the sampling frequencies are not different, some of the output data may get dropped or read twice
on the slave side. You can see if these are happening by
Table 9.5 Switching between Modulation Function and General-Purpose I/O Port (Register Connection)
Table 9.3 Master/Slave Switching (Register Connection)
RLRCK
RMCK
RBCK
Pin
_____
Pull-down
Pull-down
CKST/PB
___
INT State
Pull-up
Pull-up
LC89057W-VF4A-E
Table 9.4 Clock Pin State
Master mode
Output
Output
Output
_______
INT and the microcontroller interface.
_____
CKST/PB)
General-purpose I/O
Modulation function
Function
Master
Mode
Slave
Slave mode
INT pin.
______
Output
Input
Input
__________
CKST/PB.
____
INT)
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