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LED7708 Folha de dados(PDF) 40 Page - STMicroelectronics

Nome de Peças LED7708
Descrição Electrónicos  16 channels x 85 mA LED driver with boost controller and 4-wire serial interface
PDF  53 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LED7708 Folha de dados(HTML) 40 Page - STMicroelectronics

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Recommended operating conditions
LED7708
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Doc ID 022698 Rev 1
Equation 15
Figure 12.
Dimming signals and synchronization
Table 21.
Function of pins involved in dimming control
Pin
Function
GSCK
Input or output, depending on FOSC pin status;
FOSC high: grayscale clock input, internal oscillator disabled.
FOSC to resistor: grayscale clock output. The clock, internally generated by the dimming
oscillator, is provided at this pin.
FOSC
Internal oscillator frequency setting. See above.
GSSY
Input or output pin, depending on DSYS bit value. Used for dimming synchronization.
See Table 21.
Table 22.
Dimming synchronization control
DSYS
Dimming sync selector (locked if DEN is asserted)
0
The GSSY pin is set as output and provides a pulse at the end of each dimming cycle.
The device continuously performs a latency+dimming sequence.
1
The GSSY pin is set as input. The ongoing dimming sequence is reset as soon as a
rising edge on the GSSY input is detected; a new latency+dimming cycle is triggered by
the falling edge on this pin.
N
OSC
DIM
2
f
f
=



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