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Winbond W78E52C/W78E052C 8-bit Microcontroller Datasheet
The W78E52C/W78E052C is an 8‑bit CMOS microcontroller compatible with the standard 8051 instruction set. It offers 8 KB Flash EPROM, 256 bytes RAM, four 8‑bit bi‑directional I/O ports, an extra 4‑bit port, three 16‑bit timer/counters, a full‑duplex UART, and a hardware watchdog timer. The device operates from a 4.5 V to 5.5 V supply and supports idle and power‑down power‑saving modes.
The datasheet is organized into sections covering general description, features, pin configurations and descriptions, functional blocks, security bits, electrical characteristics, timing waveforms, typical application circuits, package dimensions, and revision history. It also lists the eight interrupt sources and provides package options (DIP‑40, PLCC‑44, PQFP‑44).
Winbond W78E52C specifications
| Flash EPROM size | 8 KB |
|---|---|
| RAM size | 256 bytes |
| Supply voltage range | 4.5 V to 5.5 V |
| Program memory address space | 64 KB |
| Data memory address space | 64 KB |
| I/O ports | Four 8‑bit ports + one 4‑bit port (P4) |
| Additional I/O port | 4‑bit port P4 |
| Timers / counters | Three 16‑bit timer/counters |
| Serial interface | Full‑duplex UART |
| Watchdog timer | Included |
| Interrupt sources | Eight sources, two‑level capability |
| Power‑saving modes | Idle and power‑down |
| Package options | DIP‑40, PLCC‑44, PQFP‑44 (RoHS) |
Source: Winbond W78E52C/W78E052C 8-bit Microcontroller Datasheet
All Winbond W78E52C documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the flash memory size of the W78E52C/W78E052C?
The microcontroller contains an 8 KB Flash EPROM.
From: Winbond W78E52C/W78E052C 8-bit Microcontroller Datasheet
How many I/O ports does the device provide?
It has four 8‑bit bi‑directional ports and an additional 4‑bit port (P4).
From: Winbond W78E52C/W78E052C 8-bit Microcontroller Datasheet
What is the flash memory size of the W78E52C?
The W78E52C contains an 8 KB flash EPROM.
From: winbond electron corp 8-BIT MTP MICROCONTROLLER W78E52C Manual
How many I/O ports does the W78E52C provide?
It has four 8‑bit bi‑directional I/O ports and an additional 4‑bit port (P4).
From: winbond electron corp 8-BIT MTP MICROCONTROLLER W78E52C Manual