W78E052DDG Microcontroller Unit- Pinout, Features, Working, Application, Datasheet

18 May 2021 - 0 Comments

W78E052DDG Microcontroller

W78E052DDG Pinout

W78E052DDG is a successive microcontroller unit that is fully compatible with the widely popular 8052 despite having an 8051 core. It is an 8-bit architecture based microcontroller unit that has 8 kilobytes of Flash.

It has 256 bytes of RAM, 4 8-bit bi-directional I/O ports, specified as P0, P1, P2, P3, and 4-bit I/O port P4. Three 16-bit timer/counters, a hardware watchdog timer, and a serial port make this microcontroller easy to integrate with multiple applications.

The specialty of this microcontroller unit is the optional 12T or 6T mode. In 12T mode, it uses 12 clocks per machine cycle where the speed of the processor goes up to 40 MHz at 5V operating voltage. At the same time, if 6T Mode is selected, 6 clocks per machine cycle operation make the controller speed up to 20 MHz at 5V operating voltage.

It supports 2.4V to 5.5V operation, which makes it suitable for 3.3V to 5V logic level operations.

Pin Description of W78E052DDG

Pin no.	Pin name	The main function (after reset)
1	PT2, P1.0	Timer Counter 2 external count, Port 1 Bit 0
2	T2EX, P1.1	Timer/Counter 2 Reload/capture control, Port 1 Bit 1.
3	P1.2	Port 1 Bit 2
4	P1.3	Port 1 Bit 3
5	P1.4	Port 1 Bit 4
6	P1.5	Port 1 Bit 5
7	P1.6	Port 1 Bit 6
8	P1.7	Port 1 Bit 7
9	RST	RESET
10	RXD, P3.0	Serial Port 0 Input, Port 3 bit 0
11	TXD, P3.1	Serial Port Output, Port 3 bit 1
12	INT0, P3.2	External Interrupt 0, Port 3 bit 2
13	INT1, P3.3	External Interrupt 1, Port 3 bit 3
14	T0, P3.4	Timer 0 External Input. Port 3 Bit 4
15	T1, P3.5	Timer 1 External Input, Port 3 Bit 5
16	WR, P3.6	External Data Memory Write Strobe, Port 3 bit 6
17	RD, P3.7	External Data Memory Read Strobe, Port 3 bit 7
18	XTAL2	CRYSTAL2
19	XTAL1	CRYSTAL1
20	VSS	Ground
21	P2.0, A8	Port 1 Bit 0
22	P2.1, A9	Port 2 bit 1, Upper Address bit 9
23	P2.2, A10	Port 2 bit 2, Upper Address bit 10
24	P2.3, A11	Port 2 bit 3, Upper Address bit 11
25	P2.4, A12	Port 2 bit 4, Upper Address bit 12
26	P2.5, A13	Port 2 bit 5, Upper Address bit 13
27	P2.6, A14	Port 2 bit 6, Upper Address bit 14
28	P2.7, A15	Port 2 bit 7, Upper Address bit 15
29	PSEN	PROGRAM STORE ENABLE
30	ALE	ADDRESS LATCH ENABLE:
31	EA	EXTERNAL ACCESS ENABLE:
32	P0.7, AD7	Port 0 bit 7, Low order address bit 7
33	P0.6, AD6	Port 0 bit 6, Low order address bit 6
34	P0.5, AD5	Port 0 bit 5, Low order address bit 5
35	P0.4, AD4	Port 0 bit 4, Low order address bit 4
36	P0.3, AD3	Port 0 bit 3, Low order address bit 3
37	P0.2,AD2	Port 0 bit 2, Low order address bit 2
38	P0.1, AD1	Port 0 bit 1, Low order address bit 1
39	P0.0, AD0	Port 0 bit 0, Low order address bit 0
40	VDD	Power Supply Positive

Features and Specifications of W78E052DDG Microcontroller

Core: 8051-based CMOS
8052 compatible instruction sets
Data Bus width: 8bit
Maximum Clock Frequency: 40 MHz (12T mode, 12 clocks per machine cycle operation), 20 MHz (6T Mode, 6 clocks per machine cycle operation)
Program Memory size: 8kB
Data RAM size: 256B
MCS-51 compatible pin and instruction set.
Operating supply: 2.4V to 5.5 V
Minimum operating Temperature: - 40C
Maximum Operating Temperature : + 85C
Program Memory Type: Flash
Interface Type: UART
Number of 8-bit I/O ports: 4
Number of Times/counters: 3
Timer / Counter Resolution - 16 bits
Product Type: 8-bit 8051 based Microcontrollers MCU
EMI Reduction mode
Full-duplex serial port - 1

Note: Complete technical details can be found in the W78E052DDG Datasheet linked at the bottom of this page.

Alternative Product of W78E052DDG

Alternative products for the W78E052DDG microcontroller are listed below-

W78E054DDG
W78E051D

W78E052DDG - Overview

W78E052DDG Microcontroller Unit

The W78E052DDG 8-bit microcontroller is an 8051 based CMOS microcontroller unit that has limited peripheral support having a vast range of GPIOs and a single full-duplex UART.

This controller has a 3pcs 16bits Timer/Counter. A full-duplex single UART is very good to make communication with PC-based applications. Here is the diagram that is offered by the nuvoton W78E052DDG.

W78E052DDG Microcontroller Unit

W78E052DDG is a successive low-cost, high pin count microcontroller mainly designed for I/O based operations where peripheral support is less important but I/O counts are required.

How to Select your Nuvoton Microcontroller

Nuvoton provides a vast variety of microcontrollers that are easy to integrate and affordable. Each MCU has its advantage and disadvantage. There are many parameters that one has to consider before selecting an MCU for the project. The below points are just suggestions that might help you to select an MCU.

If you are a beginner who is learning nuvoton microcontrollers then, selecting an MCU that has good online community support and wide applications will be a good choice. W78E052DDG is a good choice in that case. There is a wide range of support and documentation available, as well as pre-written application codes that are very useful for getting started with nuvoton microcontroller units.

Consider the operating voltage of your system. If they are 5V, then select a 5V MCU. Some sensors or devices work and communicate on 3.3V in such cases a 3.3V MCU can be selected. W78E052DDG supports both operating voltages and can be used in multiple operations.

Based on the sensors and actuators used in your project, verify which modules you might need for MCU. For example, if you want to control peripherals that require many I/O pins, the W78E052DDG series microcontroller has enough I/O pins to support this requirement.

If your project involves communication protocols like UART, SPI, I2C, CAN, etc make sure your nuvoton microcontroller can support them all. Some MCU can support more than one module of the same protocol.

Programming nuvoton Microcontroller W78E052DDG

Nuvoton 8052 based microcontrollers can be programmed with different software that is available in the market. The details given below are for the most advanced and common software and compiler. This microcontroller supports MCS-51.

To program the nuvoton microcontroller, we will need an IDE (Integrated Development Environment), where the programming takes place. A compiler, where our program gets converted into MCU readable form called HEX files.

IDE: Keil u-vision

Compiler: C51 Compiler

Keil u-vision is not free but useful for most of the operations with the free version available. They can be downloaded directly from their official page. I have also provided the link for your convenience. Once downloaded, install them on your computer. If you have any problem doing so, you can leave a comment below, I will help you with the same.

Keil-C51 Download

W78E052DDG Interfacing Diagram

The interfacing of sensors or other devices with the W78E052DDG microcontroller is quite easy. But, due to the unavailability of SPI, I2C, and ADC, it doesn't support different communication protocols. Here is an example application of External 64 kB RAM. It uses an internal program memory.

W78E052DDG Interfacing Diagram