The ST7920 is a low‑power LCD controller IC that supports 8‑bit, 4‑bit and serial MPU interfaces. It includes built‑in CGROM, HCGROM and GDRAM, providing up to 8192 Chinese characters (16×16) and 126 alphanumeric symbols (16×8). The device operates from 2.7 V to 5.5 V and offers standby current as low as 30 µA.
The document details the pin layout, pad dimensions, power‑supply requirements, boost circuit, clock options and timing diagrams. It also lists revision history and provides recommended external components for proper operation. This manual is written in Chinese.
| Operating voltage | 2.7 V to 5.5 V |
|---|---|
| Normal mode current consumption | 450 µA Typ (VDD=5 V) |
| Standby mode current consumption | 30 µA Max (VDD=5 V) |
| LCD Vpp (max) | 7 V |
| HCGROM capacity | 126 alphanumeric symbols (16×8) |
| GDRAM size | 64 × 256 bits |
| CGRAM size | 64 × 16 bits |
The ST7920 operates from 2.7 V to 5.5 V.
In normal mode it draws about 450 µA at a 5 V supply.
Standby current is 30 µA maximum at a 5 V supply.