W78C438C_06 datasheet, PDF - EEWORLD Datasheet

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W78C438C_06: Description8-BIT, 40 MHz, MICROCONTROLLER, PQFP100; Categorysemiconductor The embedded processor and controller; File Size255KB，22 Pages; ManufacturerWinbond Electronics Corporation; Websitehttp://www.winbond.com.tw

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W78C438C_06 Overview

8-BIT, 40 MHz, MICROCONTROLLER, PQFP100

W78C438C_06 Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	100
Maximum operating temperature	70 Cel
Minimum operating temperature	0.0 Cel
Maximum supply/operating voltage	5.5 V
Minimum supply/operating voltage	4.5 V
Rated supply voltage	5 V
External data bus width	8
Number of input and output buses	40
Line speed	40 MHz
Processing package description	ROHS COMPLIANT, PLASTIC, QFP-100
Lead-free	Yes
EU RoHS regulations	Yes
China RoHS regulations	Yes
state	TRANSFERRED
Craftsmanship	CMOS
packaging shape	RECTANGULAR
Package Size	FLATPACK
surface mount	Yes
Terminal form	GULL WING
Terminal spacing	0.6500 mm
terminal coating	MATTE TIN
Terminal location	QUAD
Packaging Materials	PLASTIC/EPOXY
Temperature level	COMMERCIAL
Address bus width	20
Number of digits	8
Maximum FCLK clock frequency	40 MHz
Microprocessor type	MICROCONTROLLER

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W78C438C Data Sheet

8-BIT MICROCONTROLLER

Table of Contents-

GENERAL DESCRIPTION ......................................................................................................... 2

FEATURES ................................................................................................................................. 2

PIN CONFIGURATIONS ............................................................................................................ 3

PIN DESCRIPTION..................................................................................................................... 5

FUNCTIONAL DESCRIPTION ................................................................................................... 7

5.1

5.2

5.3

5.4

5.5

5.6

6.1

6.2

6.3

Dedicated Data and Address Port .................................................................................. 7

Additional I/O Port........................................................................................................... 9

Additional External Interrupt ........................................................................................... 9

Newly Added Special Function Registers .................................................................... 11

Power Reduction Function ........................................................................................... 11

Programming Difference............................................................................................... 12

Absolute Maximum Ratings .......................................................................................... 13

D.C. Characteristics...................................................................................................... 13

A.C. Characteristics ...................................................................................................... 14

6.3.1

6.3.2

6.3.3

Clock Input Waveform ....................................................................................................14

Program Fetch Cycle......................................................................................................14

Data Memory Read/Write Cycle .....................................................................................15

ELECRICAL CHARACTERISTICS ........................................................................................... 13

TIMING WAVEFORMS ............................................................................................................. 16

7.1

7.2

Program Fetch Cycle .................................................................................................... 16

Data Memory Read/Write Cycle ................................................................................... 17

Using 128K

8 bit External EPROM (W27E010) ........................................................ 18

84-pin PLCC ................................................................................................................. 20

100-pin QFP.................................................................................................................. 21

TYPICAL APPLICATION CIRCUITS ........................................................................................ 18

8.1

9.1

9.2

PACKAGE DIMENSIONS ......................................................................................................... 20

10.

REVISION HISTORY ................................................................................................................ 22

-1-

Publication Release Date: December 4, 2006

Revision A6

W78C438C

1. GENERAL DESCRIPTION

The W78C438C is a high-performance single-chip CMOS 8-bit microcontroller that is a derivative of

the W78C58 microcontroller family. The W78C438C is functionally compatible with the W78C32,

except that it provides either a 64 KB program/1 MB data memory address or memory-mapped chip

select logic, five general I/O ports, and four external interrupts.

In the W78C32, two I/O ports, Port 1 and Port 3, are available for general-purpose use (Port 3 also

supports alternative functions), and Port 2 and Port 0 are used as the address bus and data bus,

respectively. To enable Port 0 and Port 2 to also be used as general purpose I/O ports, the

W78C438C provides two dedicated address ports (AP5 and AP6) that serve as address output for 64

KB of memory and one address/data port (DP4) that serves as ROM code input and external RAM

data input/output. Unlike the W78C32, this product does not require an external latch device for

multiplexing low byte addresses. The W78C438C also provides four pins (AP7.0−AP7.3) to support

either 64 KB program/1 MB data memory space or memory-mapped chip select logic, one parallel I/O

port (Port 8) without bit addressing mode, and two additional external interrupts (

INT2

INT3

) .

The W78C438C is programmed in a manner fully compatible with that used to program the W78C32,

except that the external data RAM is accessed by the "MOVX @Ri" instruction. Address paging is

performed by loading page addresses into the HB (high byte) register, which is not a standard register

in the W78C32, before execution of the "MOVX @Ri" instruction.

2. FEATURES

8-bit CMOS microcontroller

Fully static design

DC to 40 MHz operation

ROM-less operation

256-byte on-chip scratchpad RAM

Either 64 KB program/1 MB data memory address space or 4 memory-mapped chip select pins

One 8-bit data/address port

Two 8-bit and one 4-bit (optional) address ports

Five 8-bit bidirectional I/O ports

−

Four 8-bit bit-addressable I/O ports and one 8-bit parallel I/O port

Eight-source, two-level interrupt capability

Three 16-bit timer/counters

Four external interrupts

One full-duplex serial channel

Built-in power management

−

Idle mode

−

Power-down mode

Packages:

−

Lead Free (RoHS) PLCC 84:

W78C438C40PL

−

Lead Free (RoHS) PQFP 100: W78C438C40FL

-2-

W78C438C_06 Related Products

	W78C438C_06	W78C438C40FL	W78C438C	W78C438C40PL
Description	8-BIT, 40 MHz, MICROCONTROLLER, PQFP100	8-BIT, 40 MHz, MICROCONTROLLER, PQFP100	8-BIT, 40 MHz, MICROCONTROLLER, PQFP100	8-BIT, 40 MHz, MICROCONTROLLER, PQFP100
Number of terminals	100	100	100	84
Maximum operating temperature	70 Cel	70 °C	70 Cel	70 °C
External data bus width	8	8	8	8
surface mount	Yes	YES	Yes	YES
Terminal form	GULL WING	GULL WING	GULL WING	J BEND
Terminal location	QUAD	QUAD	QUAD	QUAD
Temperature level	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL
Address bus width	20	20	20	20

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