LC89057W-VF4A-E
_____
9.3 Demodulation Function Master/Slave Settings (CKST/PB)
•
A master/slave function that allows multi-channel synchronized transfer using multiple LC89057W-VF4A-E ICs is
__________
included. For this setting, connects either a 10kΩ pull-down or a pull-up resistor to CKST/PB.
Set to the master mode normally, when single LC89057W-VF4A-E IC is used. When multiple LC89057W-VF4A-E
•
ICs are used, set one of them to the master mode and the others to the slave mode.
•
In the multi-channel synchronous transfer mode using multiple LC89057W-VF4A-E ICs, connect RBCK and RLRCK
(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.
•
If the input data sampling frequency or the phase are different between the master mode and slave mode or if the clock
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 INT and the microcontroller interface.
Table 9.3 Master/Slave Switching (Register Connection)
_____
CKST/PB
Pull-down
Pull-up
Mode
Master
Slave
Table 9.4 Clock Pin State
Pin
Master mode
Slave mode
RMCK
RBCK
RLRCK
Output
Output
Input
Output
Output
Input
____
9.4 Switching between Modulation Function and General-Purpose I/O Port (INT)
•
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 INT pin.
Table 9.5 Switching between Modulation Function and General-Purpose I/O Port (Register Connection)
___
INT State
Pull-down
Pull-up
Function
Modulation function
General-purpose I/O
No.7202-12/59
SANYO [ SANYO SEMICON DEVICE ]
