LED7708 STMicroelectronics, LED7708 Datasheet - Page 29

• Manufacturer Part Number: LED7708
• Description: LED Lighting Drivers 16 Ch 85mA LED 3.6 to 36V 250kHz
• Manufacturer: STMicroelectronics

Specifications of LED7708

• Rohs: yes

LED7708
8.5
8.5.1
8.5.2
Serial interface
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.
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.
Simplified serial interface block diagram
Internal registers
Control registers
DEVCFG0
DEVCFG1
CHSEL
CHSTA
GSLAT
Doc ID 022698 Rev 1
Recommended operating conditions
Brightness registers
BRT01 to BRT16
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