Pseudocode Examples

The following pseudocode helps to get started with LED Fade-in Fade-out applications.

//SYNTAX: WRITE <REGISTER NAME (Hex code)>, <MSB DATA>, <LSB DATA>
//Write MARGIN-HIGH code (12-bit aligned) for bright LED light
//For a 1.818-V output range, the 10-bit hex code for 1 V is 0x0233.
//With 12-bit alignment, it becomes 0x08CC 
WRITE DAC_MARGIN_HIGH(0x25), 0x08, 0xCC 
//Write MARGIN-LOW code (12-bit aligned) for dim LED light 
//For a 1.818-V output range, the 10-bit hex code for 0.5 V is 0x011A. 
//With 12-bit alignment, it becomes 0x0468 
WRITE DAC_MARGIN_LOW(0x26), 0x04, 0x68 
//Map GPI to margin high-low function 
WRITE CONFIG2(0xD2), 0x10, 0x00 
//Enable GPI 
WRITE TRIGGER(0xD3), 0x04, 0x08 
//Configure internal reference with 1.5x output span, and slew time and power-up the device //CODE_STEP: 1 LSB, SLEW_RATE: 4915.2 us 
WRITE GENERAL_CONFIG(0xD1), 0x01, 0x64
//Program the EEPROM 
WRITE TRIGGER(0xD3), 0x04, 0x18