W78C51D-24 datasheet, PDF - EEWORLD Datasheet

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W78C51D-24: Description8-BIT MICROCONTROLLER; CategoryThe embedded processor and controller Microcontrollers and processors; File Size167KB，18 Pages; ManufacturerWinbond Electronics Corporation; Websitehttp://www.winbond.com.tw

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W78C51D-24 Overview

8-BIT MICROCONTROLLER

W78C51D-24 Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Winbond Electronics Corporation
Parts packaging code	DIP
package instruction	DIP,
Contacts	40
Reach Compliance Code	unknow
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	R-PDIP-T40
JESD-609 code	e0
length	52.2 mm
Number of I/O lines	32
Number of terminals	40
Maximum operating temperature	70 °C
Minimum operating temperature
PWM channel	NO
Package body material	PLASTIC/EPOXY
encapsulated code	DIP
Package shape	RECTANGULAR
Package form	IN-LINE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
Certification status	Not Qualified
ROM programmability	MROM
Maximum seat height	5.334 mm
speed	40 MHz
Maximum supply voltage	5.5 V
Minimum supply voltage	4.5 V
Nominal supply voltage	5 V
surface mount	NO
technology	CMOS
Temperature level	COMMERCIAL
Terminal surface	TIN LEAD
Terminal form	THROUGH-HOLE
Terminal pitch	2.54 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	15.24 mm
uPs/uCs/peripheral integrated circuit type	MICROCONTROLLER

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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

W78C51D-24 Related Products

	W78C51D-24	W78C51DP-40	W78C51DP-24	W78C51DF-40	W78C51DF-24	W78C51D-40	W78C51D
Description	8-BIT MICROCONTROLLER	8-BIT MICROCONTROLLER	8-BIT MICROCONTROLLER	8-BIT MICROCONTROLLER	8-BIT MICROCONTROLLER	8-BIT MICROCONTROLLER	8-BIT MICROCONTROLLER
Is it Rohs certified?	incompatible	incompatible	incompatible	incompatible	incompatible	incompatible	-
Maker	Winbond Electronics Corporation	Winbond Electronics Corporation	Winbond Electronics Corporation	Winbond Electronics Corporation	Winbond Electronics Corporation	Winbond Electronics Corporation	-
Parts packaging code	DIP	LCC	LCC	QFP	QFP	DIP	-
package instruction	DIP,	PLASTIC, LCC-44	QCCJ,	QFP-44	QFP,	DIP-40	-
Contacts	40	44	44	44	44	40	-
Reach Compliance Code	unknow	_compli	unknow	_compli	unknow	_compli	-
ECCN code	3A991.A.2	3A991.A.2	3A991.A.2	3A991.A.2	3A991.A.2	3A991.A.2	-
Has ADC	NO	NO	NO	NO	NO	NO	-
Address bus width	16	16	16	16	16	16	-
bit size	8	8	8	8	8	8	-
maximum clock frequency	40 MHz	40 MHz	40 MHz	40 MHz	40 MHz	40 MHz	-
DAC channel	NO	NO	NO	NO	NO	NO	-
DMA channel	NO	NO	NO	NO	NO	NO	-
External data bus width	8	8	8	8	8	8	-
JESD-30 code	R-PDIP-T40	S-PQCC-J44	S-PQCC-J44	S-PQFP-G44	S-PQFP-G44	R-PDIP-T40	-
JESD-609 code	e0	e0	e0	e0	e0	e0	-
length	52.2 mm	16.59 mm	16.59 mm	10 mm	10 mm	52.2 mm	-
Number of I/O lines	32	36	36	36	36	32	-
Number of terminals	40	44	44	44	44	40	-
Maximum operating temperature	70 °C	70 °C	70 °C	70 °C	70 °C	70 °C	-
PWM channel	NO	NO	NO	NO	NO	NO	-
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-
encapsulated code	DIP	QCCJ	QCCJ	QFP	QFP	DIP	-
Package shape	RECTANGULAR	SQUARE	SQUARE	SQUARE	SQUARE	RECTANGULAR	-
Package form	IN-LINE	CHIP CARRIER	CHIP CARRIER	FLATPACK	FLATPACK	IN-LINE	-
Peak Reflow Temperature (Celsius)	NOT SPECIFIED	225	225	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	-
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	-
ROM programmability	MROM	MROM	MROM	MROM	MROM	MROM	-
Maximum seat height	5.334 mm	4.699 mm	4.699 mm	2.7 mm	-	5.334 mm	-
speed	40 MHz	40 MHz	40 MHz	40 MHz	40 MHz	40 MHz	-
Maximum supply voltage	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	-
Minimum supply voltage	4.5 V	4.5 V	4.5 V	4.5 V	4.5 V	4.5 V	-
Nominal supply voltage	5 V	5 V	5 V	5 V	5 V	5 V	-
surface mount	NO	YES	YES	YES	YES	NO	-
technology	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	-
Temperature level	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	-
Terminal surface	TIN LEAD	Tin/Lead (Sn/Pb)	TIN LEAD	Tin/Lead (Sn/Pb)	TIN LEAD	Tin/Lead (Sn/Pb)	-
Terminal form	THROUGH-HOLE	J BEND	J BEND	GULL WING	GULL WING	THROUGH-HOLE	-
Terminal pitch	2.54 mm	1.27 mm	1.27 mm	0.8 mm	0.8 mm	2.54 mm	-
Terminal location	DUAL	QUAD	QUAD	QUAD	QUAD	DUAL	-
Maximum time at peak reflow temperature	NOT SPECIFIED	30	30	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	-
width	15.24 mm	16.59 mm	16.59 mm	10 mm	10 mm	15.24 mm	-
uPs/uCs/peripheral integrated circuit type	MICROCONTROLLER	MICROCONTROLLER	MICROCONTROLLER	MICROCONTROLLER	MICROCONTROLLER	MICROCONTROLLER	-

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