This guide describes the HT1620, a 32×4 (128-segment) LCD driver from ZLG. It lists features, a selection table, block diagram, pin arrangement, pad coordinates and descriptions, absolute maximum ratings, and DC/AC characteristics.
The functional sections explain the display RAM structure, time base and watchdog timer, buzzer tone output, LCD driver settings, command and data modes, the 4-line serial interface, and read/write timing diagrams. This manual is written in Chinese.
| Operating voltage | 2.4 V to 3.3 V |
|---|---|
| LCD voltage | 3.6 V to 4.9 V |
| Operating current | Less than 3 µA at 3 V |
| Display capacity | 128 segments (32×4) |
| Display RAM | 32×4 bits |
| Serial interface | 3-wire serial interface |
| External crystal | 32.768 kHz |
| Buzzer frequencies | 2 kHz or 4 kHz |
The HT1620 operates from 2.4 V to 3.3 V.
Communication between the master controller and the HT1620 requires only 3 to 4 lines.
The HT1620 is a 32×4 LCD driver with 128 display segments.
It uses an external 32.768 kHz crystal.