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参数资料
| 型号： | LC89057W-VF4-E |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封装： | 7 X 7 MM, SQFP-48 |
| 文件页数： | 3/61页 |
| 文件大小： | 355K |
| 代理商： | LC89057W-VF4-E |
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LC89057W-VF4-E
No. 7202-11/61
7.3. Demodulation Function Master/Slave Settings (CKST)
A master/slave function that allows multi-channel synchronized transfer using multiple LC89057W-VF4-E LSIs is
built in. This setting connects either a 10k
pull-down or a pull-up resistor to CKST.
Set the master mode when using only one LC89057W-VF4-E LSI. When using multiple LC89057W-VF4-E LSIs,
set one to the master mode and the others to the slave mode.
To perform multi-channel transfer using multiple LC89057W-VF4-E LSIs, 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, set the same polarity for RBCK and RLRCK and the same frequency for XIN and
XMCK.
If the input data sampling frequency or the phase between the master and slave differ or if the clock sources differ
even though the sampling frequencies are the same, some of the output data may get dropped or read twice on the
slave side. Whether this phenomenon is occurring can be checked with INT and the microcontroller interface.
Table 7.3. Master/Slave Switching
CKST
Mode
Pull-down
Master mode
Pull-up
Slave mode
Table 7.4. Clock Pin State
Pin
Master mode
Slave mode
RMCK
Output
Low
RBCK
Output
Input
RLRCK
Output
Input
7.4 Modulation Function and General-Purpose I/O Port Switching (INT)
The modulation function and the general-purpose I/O function share the same pin and therefore cannot be used
simultaneously.
To switch functions, connect either a 10k
pull-down or pull-up resistor to INT.
Table 7.5. Modulation Function and General-Purpose I/O Switching
INT State
Function
pull-down
Modulation f unction
Pull-up
General-purpose I/O
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