W78E052DDG Microcontroller: Overview, Features, and Applications

Hi readers welcome to the new post. Here we will discuss W78E052DDG Microcontroller. It is a certain category of controllers that has compatibility to the 8052 controllers. It is an eight-bit controller that comes with eight KB flash memory. It comprises the two fifty-six bytes of the random access memory unit,

It also has a timer of sixteen bits that comes with a hardware watchdog. In this tutorial, we will discuss the different factors of this microcontroller with detail. So let get started.

Table of Contents

Introduction to the W78E052DDG

W78E052DDG is a microcontroller that has compatibility with the very commonly used structure of controller 8052 also has a ram having a capacity of two fifty-six bytes eight bits two-dimensional input and output ports, denoted as P0, P1, P2, P3, and 4-bit I/O port P4. The fourth 16-bit timer/counters, a hardware watchdog timer, and a serial port make this microcontroller easy to integrate with multiple applications.

This tutorial is related to firmware for the W78E052DDG. It is based on a pre-release version of firmware that supports two different model lines of the W78E052DDG.
The firmware upgrade instructions from version 1.9 to version 2.2 are included in the version used in this article.
The example of software given with this module is followed the 1.9 addition of firmware. The version is not now used commonly or is quite old. The latest firmware release is 2.

Introduction to microcontroller programming?

You can quickly convert an ordinary digital watch into a programmable watch by hacking it. Instead of a CPU, your watch uses a 16-bit LCD display, 64 bytes of programmable RAM, and 8 bytes of flash memory

The programmable RAM is accessible from the microcontroller and the screen by reading data via two RS232 serial ports. One port connects to your computer, the other to the watch.
For the programming phase, a microcontroller and its display are connected via 8-bit serial interfaces to one another and an 8-bit microcontroller serial to 8-bit computer interface, typically USB.A microcontroller’s 8-bit UART interface can be used to serially program a watch, or the microcontroller’s 8-bit I/O port can be used to program a watch by reading 8-bit I/O data from the watch.

Features of the W78E052DDG Microcontroller

Here some features listed
8-bit CPU
Operating frequency up to 40 MHz
64 KB of program memory
2 KB of RAM
4 KB of EEPROM
Up to 4 serial ports
10-bit ADC
PWM output
Up to 5 timers/counters
On-chip watchdog timer
Low power consumption

W78E052DDG microcontroller Pinout

Pin Number	Pin Name	Description
1	P3.0	General-purpose I/O pin
2	P3.1	General-purpose I/O pin
3	P3.2	General-purpose I/O pin
4	P3.3	General-purpose I/O pin
5	P3.4	General-purpose I/O pin
6	P3.5	General-purpose I/O pin
7	P3.6	General-purpose I/O pin
8	P3.7	General-purpose I/O pin
9	XTAL1	Crystal oscillator input
10	XTAL2	Crystal oscillator output
11	EA	External Access input
12	PSEN	Program Store Enable input
13	ALE	Address Latch Enable output
14	RESET	Reset input
15	P0.0	General-purpose I/O pin
16	P0.1	General-purpose I/O pin
17	P0.2	General-purpose I/O pin
18	P0.3	General-purpose I/O pin
19	P0.4	General-purpose I/O pin
20	P0.5	General-purpose I/O pin
21	P0.6	General-purpose I/O pin
22	P0.7	General-purpose I/O pin
23	VSS	Ground
24	VDD	Power supply voltage
25	P1.0	General-purpose I/O pin
26	P1.1	General-purpose I/O pin
27	P1.2	General-purpose I/O pin
28	P1.3	General-purpose I/O pin
29	P1.4	General-purpose I/O pin
30	P1.5	General-purpose I/O pin
31	P1.6	General-purpose I/O pin
32	P1.7	General-purpose I/O pin
33	RSTOUT	Reset output
34	P2.0	General-purpose I/O pin
35	P2.1	General-purpose I/O pin
36	P2.2	General-purpose I/O pin
37	P2.3	General-purpose I/O pin
38	P2.4	General-purpose I/O pin
39	P2.5	General-purpose I/O pin
40	P2.6	General-purpose I/O pin
41	P2.7	General-purpose I/O pin
42	INT0	External interrupt 0 input
43	INT1	External interrupt 1 input
44	T0	Timer/Counter 0 input/output
45	T1	Timer/Counter 1 input/output

Alternative of W78E052DDG

microcontroller	Manufacturer	Architecture	Flash Memory	RAM	Communication Protocols	Bit Width	Operating Voltage	Max Speed
Atmel AT89S52	Atmel	8051	8KB	256 bytes	UART, SPI, I2C	8-bit	2.7V – 5.5V	33MHz
Microchip PIC16F877A	Microchip	PIC	14KB	368 bytes	UART, SPI, I2C	8-bit	4.5V – 5.5V	20MHz
NXP LPC2148	NXP	ARM7TDMI-S	512KB	32KB	USB, Ethernet	32-bit	2.0V – 3.6V	60MHz
STMicroelectronics STM32F103	STMicroelectronics	ARM Cortex-M3	Up to 128KB	Up to 20KB	USB, Ethernet	32-bit	2.0V – 3.6V	72MHz

Step-by-step guide to program the W78E052DDG

Here we’ll cover each of the 16 I/O pins on the W78E052DDG. Each of these pins is mapped in relation to its specific function in the operating system.

For example, the I2C pins are mapped to two serial ports. In the following, we’ll go through the steps to program the W78E052DDG in BASIC. Pins I2C P0, P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11, P12, and P13 are the names of the W78E052DDG’s 16 I2C pins.
We will use a series of commands to control the I2C pins.
The four major registers are numbered 0, 1, 2, and 3, and each command corresponds to one of them.

Architecture of the W78E052DDG Microcontroller

Feature	Detail
Processor Core	8051 Core
CPU Speed	Up to 25 MHz
Data Bus Width	8-bit
Address Bus Width	16-bit
Instruction Set	8051 Instruction Set
On-Chip Memory	32 KB Flash, 256 B RAM
External Memory	Up to 64 KB
Timers/Counters	3 Timers, 1 Watchdog Timer, 2 Capture/Compare Units
Serial Interfaces	UART, SPI, I2C
Parallel Interfaces	4 8-bit I/O Ports, 1 4-bit I/O Port
ADC Channels	8
PWM Channels	2
Operating Voltage	2.4V to 5.5V
Power Consumption	6 mA at 5V, 25 MHz (typical)
Operating Temperature	-40°C to 85°C