The W78C354 is a high-performance monitor microcontroller that is based on the embedded 80C32 microcontroller core. It includes a 16 KB ROM, 512 byte internal data RAM, a 6-bit A/D converter, two 12-bit and fourteen 8-bit PWM static DACs, one 12-bit and three 8-bit PWM dynamic DACs, a sync processor, an I2C port, a DDC port, a watchdog timer, and glue logic specially designed for monitor applications. The W78C354 is suitable for monitors applying VESA DDC1/DDC2B/DDC2B+. The high level of integration and the availability of a one-time programmable (OTP) flash PROM version (the W78E354) help reduce unit costs, development costs, and development time.
The W78C354 is a high‑performance monitor microcontroller based on the 80032 core. It integrates 16 KB of ROM, 512 bytes of on‑chip RAM, a 6‑bit ADC, multiple PWM DACs, a sync processor, DDC and serial ports, and a watchdog timer, targeting VESA monitor applications.
The document provides a complete pin‑out table for PLCC‑68, DIP‑48 and DIP‑40 packages, functional block diagrams, detailed pin descriptions, memory map, and mechanical dimensions, allowing designers to implement the device in monitor designs.
| Maximum operating frequency | 20 MHz |
|---|---|
| ROM size | 16 KB |
| On‑chip data RAM | 512 bytes |
| ADC resolution | 6‑bit |
| Static PWM DACs (12‑bit) | 2 |
| Static PWM DACs (8‑bit) | 14 |
| Dynamic PWM DACs (12‑bit) | 1 |
| Dynamic PWM DACs (8‑bit) | 3 |
| LED driver pins | Two 15 mA output pins |
| Package types | PLCC‑68, DIP‑48, DIP‑40 |
The W78C354 operates up to 20 MHz.
It includes 16 KB of ROM for program storage.
The device features a 6‑bit ADC with four multiplexed analog inputs.
The microcontroller is offered in PLCC‑68, DIP‑48, and DIP‑40 packages.