W78C51DP-24/40 datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > The embedded processor and controller> Microcontrollers and processors> W78C51DP-24/40

W78C51DP-24/40: DescriptionMicrocontroller, 8-Bit, MROM, 40MHz, CMOS, PQCC44, PLASTIC, LCC-44; CategoryThe embedded processor and controller Microcontrollers and processors; File Size176KB，18 Pages; ManufacturerWinbond Electronics Corporation; Websitehttp://www.winbond.com.tw

Download Datasheet Parametric Compare View All

W78C51DP-24/40 Overview

Microcontroller, 8-Bit, MROM, 40MHz, CMOS, PQCC44, PLASTIC, LCC-44

W78C51DP-24/40 Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Winbond Electronics Corporation
Parts packaging code	LCC
package instruction	QCCJ,
Contacts	44
Reach Compliance Code	unknown
ECCN code	3A991.A.2
Has ADC	NO
Address bus width	16
bit size	8
maximum clock frequency	40 MHz
DAC channel	NO
DMA channel	NO
External data bus width	8
JESD-30 code	S-PQCC-J44
JESD-609 code	e0
Number of I/O lines	36
Number of terminals	44
Maximum operating temperature	70 °C
Minimum operating temperature
PWM channel	NO
Package body material	PLASTIC/EPOXY
encapsulated code	QCCJ
Package shape	SQUARE
Package form	CHIP CARRIER
Peak Reflow Temperature (Celsius)	225
Certification status	Not Qualified
ROM programmability	MROM
speed	40 MHz
Maximum supply voltage	5.5 V
Minimum supply voltage	4.5 V
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Temperature level	COMMERCIAL
Terminal surface	TIN LEAD
Terminal form	J BEND
Terminal location	QUAD
Maximum time at peak reflow temperature	30
uPs/uCs/peripheral integrated circuit type	MICROCONTROLLER

Preview

Download Datasheet

View All

Preliminary W78C51D

8-BIT MICROCONTROLLER

GENERAL DESCRIPTION

The W78C51D microcontroller supplies a wider frequency and supply voltage range than most 8-bit

microcontrollers on the market. It is compatible with the industry standard 80C51 microcontroller

series.

The W78C51D contains four 8-bit bidirectional parallel ports, one extra 4-bit bit-addressable I/O port

(Port 4) and two additional external interrupts (

INT2

, INT3 ), two 16-bit timer/counters, one watchdog

timer and a serial port. These peripherals are supported by a seven-source, two-level interrupt

capability. There are 128 bytes of RAM and an 4K byte mask ROM for application programs.

The W78C51D microcontroller has two power reduction modes, idle mode and power-down mode,

both of which are software selectable. The idle mode turns off the processor clock but allows for

continued peripheral operation. The power-down mode stops the crystal oscillator for minimum power

consumption. The external clock can be stopped at any time and in any state without affecting the

processor.

FEATURES

•

Fully static design

•

Supply voltage of 4.5V to 5.5V

•

DC-40 MHz operation

•

128 bytes of on-chip scratchpad RAM

•

4K bytes of on-chip mask ROM

•

64K bytes program memory address space

•

64K bytes data memory address space

•

Four 8-bit bidirectional ports

•

Two 16-bit timer/counters

•

One full duplex serial port

•

Seven

-source, two-level interrupt capability

•

One extra 4-bit bit-addressable I/O port

•

Two additional external interrupts

INT2

/ INT3

•

Watchdog timer

•

EMI reduction mode

•

Built-in power management

•

Code protection

•

Packages:

−

DIP 40: W78C51D-24/40

−

PLCC 44: W78C51DP-24/40

−

QFP 44: W78C51DF-24/40

-1-

Publication Release Date: January 1999

Revision A1

Preliminary W78C51D

FUNCTIONAL DESCRIPTION

The W78C51D architecture consists of a core controller surrounded by various registers, five general

purpose I/O ports, 128 bytes of RAM, two timer/counters, one watchdog timer and a serial port. The

processor supports 111 different opcodes and references both a 64K program address space and a

64 K data storage space.

Timers 0, 1

Timers 0, 1 each consist of two 8-bit data registers. These are called TL0 and TH0 for Timer 0, TL1

and TH1 for Timer 1. The TCON and TMOD registers provide control functions for timers 0, 1.

Clock

The W78C51D is designed to be used with either a crystal oscillator or an external clock. Internally,

the clock is divided by two before it is used. This makes the W78C51D relatively insensitive to duty

cycle variations in the clock.

Crystal Oscillator

The W78C51D incorporates a built-in crystal oscillator. To make the oscillator work, a crystal must be

connected across pins XTAL1 and XTAL2. In addition, a load capacitor must be connected from each

pin to ground, and a resistor must also be connected from XTAL1 to XTAL2 to provide a DC bias

when the crystal frequency is above 24 MHz.

External Clock

An external clock should be connected to pin XTAL1. Pin XTAL2 should be left unconnected. The

XTAL1 input is a CMOS-type input, as required by the crystal oscillator. As a result, the external clock

signal should have an input high level of greater than 3.5 volts when V

= 5 volts.

Power Management

Idle Mode

The idle mode is entered by setting the IDL bit in the PCON register. In the idle mode, the internal

clock to the processor is stopped. The peripherals and the interrupt logic continue to be clocked. The

processor will exit idle mode when either an interrupt or a reset occurs.

Power-down Mode

When the PD bit of the PCON register is set, the processor enters the power-down mode. In this

mode all of the clocks, including the oscillator are stopped. The only way to exit power-down mode is

by a reset.

Reset

The external RESET signal is sampled at S5P2. To take effect, it must be held high for at least two

machine cycles while the oscillator is running.

An internal trigger circuit in the reset line is used to deglitch the reset line when the W78C51D is used

with an external RC network. The reset logic also has a special glitch removal circuit that ignores

glitches on the reset line.

During reset, the ports are initialized to FFH, the stack pointer to 07H, PCON (with the exception of

bit 4) to 00H, and all of the other SFR registers except SBUF to 00H. SBUF is not reset.

-5-

Publication Release Date: January 1999

Revision A1

W78C51DP-24/40 Related Products

	W78C51DP-24/40	W78C51DF-24/40
Description	Microcontroller, 8-Bit, MROM, 40MHz, CMOS, PQCC44, PLASTIC, LCC-44	Microcontroller, 8-Bit, MROM, 40MHz, CMOS, PQFP44, QFP-44
Is it lead-free?	Contains lead	Contains lead
Is it Rohs certified?	incompatible	incompatible
Maker	Winbond Electronics Corporation	Winbond Electronics Corporation
Parts packaging code	LCC	QFP
package instruction	QCCJ,	QFP,
Contacts	44	44
Reach Compliance Code	unknown	unknown
ECCN code	3A991.A.2	3A991.A.2
Has ADC	NO	NO
Address bus width	16	16
bit size	8	8
maximum clock frequency	40 MHz	40 MHz
DAC channel	NO	NO
DMA channel	NO	NO
External data bus width	8	8
JESD-30 code	S-PQCC-J44	S-PQFP-G44
JESD-609 code	e0	e0
Number of I/O lines	36	36
Number of terminals	44	44
Maximum operating temperature	70 °C	70 °C
PWM channel	NO	NO
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	QCCJ	QFP
Package shape	SQUARE	SQUARE
Package form	CHIP CARRIER	FLATPACK
Peak Reflow Temperature (Celsius)	225	NOT SPECIFIED
Certification status	Not Qualified	Not Qualified
ROM programmability	MROM	MROM
speed	40 MHz	40 MHz
Maximum supply voltage	5.5 V	5.5 V
Minimum supply voltage	4.5 V	4.5 V
Nominal supply voltage	5 V	5 V
surface mount	YES	YES
technology	CMOS	CMOS
Temperature level	COMMERCIAL	COMMERCIAL
Terminal surface	TIN LEAD	TIN LEAD
Terminal form	J BEND	GULL WING
Terminal location	QUAD	QUAD
Maximum time at peak reflow temperature	30	NOT SPECIFIED
uPs/uCs/peripheral integrated circuit type	MICROCONTROLLER	MICROCONTROLLER

Recommended Resources

MAX797 high current high efficiency buck converter circuit diagram

Using 5G23 regulated power supply

The most practical basic diagram circuit 19 - AC charging circuit

Wave sound biofeedback physiotherapy circuit

High frequency astable circuit

Computer motherboard circuit diagram 815 5_33

Machine Learning Interface Reference Design for Embedded Applications: This reference design demonstrates how to use TI Deep Learning (TIDL) on Sitara AM57x system-on-chip (SoC) to introduce deep learning inference in embedded applications. This design demonstrates how t...; Jacktang Microcontroller MCU

How can lm3s8962 solve the dependent library: The include .h file in Keil is always in the wrong place. Sometimes it is missing this and sometimes it is missing that . It is very troublesome. Is there any good way? Well, it turns out that it is t...; ssawee Microcontroller MCU

STM32F446 NUCLEO 3.5 inch TFT LCD driver: [img]data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/+EAAC21HBhcmEAAAAAAAQAAAACZmYAAPKnAAANWAAAE9AAAApaAAAAAAAAAABYWVogAAAAAAAAA9tYAAQAAAADTLW1sdWMAAAAAAAAAAQAAAAxlblVTAAAAIAAAA BwARwBvAG8AZwBsAGUA...; xutong stm32/stm8

360 launches the convenient router "360 Portable Wi-Fi" for 19.9 yuan. How come software companies are gradually getting involved in the hardware industry?: [p=21, null, left][font=Verdana][size=14px][b][color=#000000]Following the special machine, Qihoo 360 officially entered the hardware field and launched the convenient router product "360 Portable Wif...; wstt Mobile and portable

To make analog circuits, you need the following knowledge: I personally think that the following aspects are needed to make analog circuits: a. A good teacher to guide you; (mainly thinking methods and thinking habits) b. Study a few good books; (There are al...; gina Analog electronics

51 MCU serial port communication problem: Hello everyone, I recently learned 51 serial communication. The PC sends a string of data to the microcontroller with an indefinite length. After the microcontroller receives it, it sends the original...; 圣灵枫 51mcu

Shortcut: A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF BG BH BI BJ BK BL BM BN BO BP BQ BR BS BT BU BV BW BX BY BZ C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF CG CH CI CJ CK CL CM CN CO CP CQ CR CS CT CU CV CW CX CY CZ D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF DG DH DI DJ DK DL DM DN DO DP DQ DR DS DT DU DV DW DX DZ

Popular Components