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LED7708TR Datasheet(PDF) 29 Page - STMicroelectronics

No. de pieza LED7708TR
Descripción Electrónicos  16 channels x 85 mA LED driver with boost controller and 4-wire serial interface
PDF  53 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LED7708TR Datasheet(HTML) 29 Page - STMicroelectronics

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LED7708
Recommended operating conditions
Doc ID 022698 Rev 1
29/53
8.5
Serial interface
8.5.1
Serial interface architecture
The LED7708 is equipped with a 4-wire serial interface (SI) to allow full control of its
functionalities by the host controller. The LED7708 uses four pins (DIN, DOUT, DCLK and
LE) to connect itself to the serial bus. The serial interface supports a data clock frequency
up to 30 MHz.
Figure 7.
Simplified serial interface block diagram
8.5.2
Serial interface internal registers
The internal registers are organized in control registers and brightness registers. Access to
the desired register is performed by encoding the destination address via a serial key on the
bus (a serial key consists of a certain number of clock pulses during the high-state of the LE
signal). All the internal registers are 16 bits wide.
Table 11.
Internal registers
Control registers
Brightness registers
DEVCFG0
DEVCFG1
GSLAT
CHSTA
CHSEL
BRT01 to BRT16



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