Full Name external Timing Controller* internal Timing Controller
EPD via SPI interface eTC driver with external waveform iTC driver with internal waveform
Driving Waveform Controlled by MCU Embedded in Driver IC
Customization/ Design Flexibility Higher Lower
Design-in Effort Normal Easier
One Time Programming (OTP**) N/A Yes
LUT = Look Up Table, defines the EPD driving waveform settings
* Timing Controller (TC) = Driver IC = Chip on Glass (COG)
** OTP = store LUT in TC