STCF05 STMicroelectronics, STCF05 Datasheet - Page 15

• Manufacturer Part Number: STCF05
• Description: HIGH POWER WHITE LED DRIVER WITH I2C INTERFACE
• Manufacturer: STMicroelectronics

Specifications of STCF05

• Flash Mode: up to 400 mA
• Torch Mode: up to 120 mA

STCF05
8
8.1
Figure 4.
8.2
I²C bus interface
Data transmission from the main microprocessor to STCF05 and vice versa takes place
through the 2 I²C bus interface wires, consisting of the two lines SDA and SCL (pull-up
resistors to a positive supply voltage must be externally connected).
Data validity
As shown in
clock. The HIGH and LOW state of the data line can only change when the clock signal on
the SCL line is LOW.
Data validity on the I²C bus
Start and stop conditions
Both DATA and CLOCK lines remain HIGH when the bus is not busy. As shown in
start condition is a HIGH to LOW transition of the SDA line while SCL is HIGH. The stop
condition is a LOW to HIGH transition of the SDA line while SCL is HIGH. A STOP condition
must be sent before each START condition.
Figure
4, the data on the SDA line must be stable during the high period of the
Doc ID 15257 Rev 4
I²C bus interface
Figure 5
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