This document is an introduction to the use of WT1621 by Guangzhou Weichuang Electronics Co., Ltd. The document includes product features, overview, pin descriptions, electrical parameters, etc.
This document describes the WT1621 32×4 LCD driver, covering its electrical characteristics, pin assignments, and functional blocks such as the system oscillator, time base/watchdog timer, and buzzer output. It includes command formats for reading, writing, and configuring the device, as well as timing diagrams for various operation modes.
Additional sections cover environmental limits, application circuits, and a full instruction index, making it a comprehensive reference for designers integrating the WT1621 into LCD applications. This manual is written in Chinese.
| Operating voltage | 2.4 V – 5.5 V |
|---|---|
| Standby current (5 V, no load) | 30 µA typical |
| LCD segment source current | 0.9 mA typical |
| Internal RC oscillator frequency (3 V) | 133 kHz |
| External clock input frequency (5 V) | 3.5 MHz max |
The WT1621 operates from 2.4 V to 5.5 V.
It provides a 32 × 4 display memory, allowing 32 columns and 4 rows of characters.
Set the desired tone with TONE2K or TONE4K, then issue the TONE ON command to enable the buzzer.
The device can use its internal 256 kHz RC oscillator, an external 32.768 kHz crystal, or an external 256 kHz clock.