w77ie58 8-bit microcontroller
The W77IE58 is a fast 8051‑compatible 8‑bit microcontroller with a redesigned core that executes instructions in four clock cycles. It operates from 2.7 V to 5.5 V and can run up to 25 MHz, providing lower power consumption than the original 8051.
The device includes 32 KB on‑chip Flash EPROM, 1 KB SRAM, 256 bytes scratch‑pad RAM, four 8‑bit I/O ports plus a 4‑bit port, three 16‑bit timers, two full‑duplex serial ports, 12 interrupt sources, and optional power‑saving modes (IDLE, POWER‑DOWN, Economy). Package options are 40‑pin DIP and 44‑pin PLCC/QFP.
| Flash Memory | 32 KB |
|---|---|
| On‑chip SRAM | 1 KB |
| Scratch‑pad RAM | 256 bytes |
| I/O Ports | Four 8‑bit ports + one 4‑bit port |
| Timers | Three 16‑bit timers |
| Serial Ports | Two enhanced full‑duplex serial ports |
| Interrupt Sources | 12 sources, two priority levels |
| Operating Voltage | 2.7 V – 5.5 V |
| Maximum Clock Frequency | 25 MHz |
| Package Types | 40‑pin DIP, 44‑pin PLCC/QFP |
The W77IE58 contains 32 KB of on‑chip Flash EPROM.
It provides 1 KB of on‑chip SRAM that can be accessed with the MOVX instruction.
The device operates from 2.7 V up to 5.5 V.
The microcontroller offers 12 interrupt sources with two priority levels.