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AT89C55WD-24JI

Name: AT89C55WD-24JI
Rating: 4.7 (12 reviews)

IC MCU 8BIT 20KB FLASH 44PLCC

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製造商。部分 #AT89C55WD-24JI
包 44-LCC (J-Lead)
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規格

Supplier	Microchip Technology
Package	Tube
Series	89C
ProductStatus	Obsolete
CoreProcessor	8051
CoreSize	8-Bit
Speed	24MHz
Connectivity	UART/USART
Peripherals	WDT
NumberofI/O	32
ProgramMemorySize	20KB (20K x 8)
ProgramMemoryType	FLASH
RAMSize	256 x 8
Voltage-Supply(Vcc/Vdd)	4.5V ~ 5.5V
OscillatorType	Internal
OperatingTemperature	-40°C ~ 85°C (TA)
MountingType	Surface Mount
Package/Case	44-LCC (J-Lead)

概述

Description

AT89C55WD-24JI is an 8‑bit microcontroller in Atmel’s 8051 family (now Microchip). It’s designed for embedded control and combines CPU, memory, and peripherals on a single chip.
Key features (typical):
- 8051-compatible core with standard instruction set
- On‑chip program memory (Flash) for code storage and on‑chip RAM
- Peripherals: multiple I/O ports, timers/counters, and a UART (serial)
- In-system programmable (ISP) / reprogrammable flash memory for easy updates
- External clock support up to 24 MHz (the “-24” in the part number)
- Standard 40‑pin package (and variants), suitable for compact embedded designs
Common uses:
- Small control tasks in consumer electronics, appliances, automotive modules, and industrial devices
In short, AT89C55WD-24JI offers a complete 8051-based MCU with on‑chip flash, basic peripherals, and 24 MHz clock support, enabling cost‑effective, in‑system programmable control solutions.

Features

Here are the key features of AT89C55WD-24JI (8051 family):
- 8-bit MCS-51 CPU core
- On-chip Flash program memory: 8 KB
- On-chip RAM: ~256 bytes
- I/O: 32 I/O pins (Ports 0–3)
- Timers/Counters: two 16-bit timers
- Serial interface: one full-duplex UART
- Interrupts: multiple sources with priority
- Watchdog timer (WD)
- Clocking: on-chip oscillator with external clock option
- Memory interface: MOVX external data memory support (64K address space)
- Package: 24-pin (AT89C55WD-24JI)
- Supply voltage: typically 4.5–5.5 V
- Range suitable for standard 8051 development tools and ecosystems
Note: exact RAM size and features may vary slightly by revision; the WD suffix denotes watchdog functionality.

Package

40-pin plastic DIP (DIP-40) package.

Pinout

- Pin count: 40 pins (40-pin package).
- Function: An 8-bit, 8051-compatible microcontroller (AT89C55WD) with on-chip Flash memory, RAM, I/O ports, timers, and serial interface for embedded control applications.

Manufacturer

- Manufacturer: Atmel Corporation (now part of Microchip Technology).
- What kind of company: A semiconductor company that designs and manufactures embedded microcontrollers, memory devices, and other integrated circuits; Atmel became part of Microchip Technology in 2016.

Application

Typical applications of AT89C55WD-24JI:
- Consumer electronics control (remote controls, AV gear)
- Home appliances/building automation (washers, microwaves, HVAC)
- Automotive electronics (instrument clusters, body control modules)
- Industrial automation/instrumentation (sensors, data logging, timing/sequencing)
- Motor/actuator control (PWM for DC/stepper motors)
- Education and prototyping

Equivalent

Equivalent 8051-family MCUs with similar specs (8–16 KB on-chip flash, ~256 B RAM):
- AT89S52, AT89C52 (Atmel)
- STC89C52RC, STC15F104W, STC15F2K60S2 (STC Micro)
- N76E003A (Nuvoton)