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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： | 2/11页 |
| 文件大小： | 332K |
| 代理商： | LA72670BM |
LC89057W-VF4A-E
No.7202-10/59
9. Initial System Settings
9.1 System Reset (XMODE)
The system operates correctly when XMODE is set to "H" after 3.0V or higher supply voltage is applied.
When XMODE is set to "L" after power is turned on, the system is reset.
When setting chip address, demodulation function master or slave, and modulation function or general-purpose I/O
function, connect a 10k
Ω pull-down or pull-up resistor to EMPHA/UO/CO,
____________
AUDIO/VO,
__________
CKST/PB, and
______
INT pins.
If EMPHA/UO/CO,
____________
AUDIO/VO,
__________
CKST/PB, and
______
INT are not pulled up or down, their pin state is unstable at the time
of input. Consequently proper setting cannot be realized. For these pins, pull-up or pull-down resistor must be
connected.
Table 9.1: Pin Names and Settings
Setting
Pins
Chip address
EMPHA/UO/CO,
________
AUDIO/VO
Demodulation function master or slave
_______
CKST/PB
Modulation function or general-purpose I/O function
____
INT
Figure 9.1 Setting Timing Chart of Function Setting Input Pins
DVDD
XMODE
Set pin state
3.3V
3.0V
Setting input
state
Output state
Normal system operation range
Setting completed
Undefined
min. 200
μs
Setting input
state
Output state
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