W78E54F-40 Winbond, W78E54F-40 Datasheet
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W78E54F-40
Manufacturer Part Number
W78E54F-40
Description
Manufacturer
Winbond
Datasheet
1.W78E54F-40.pdf
(23 pages)
Specifications of W78E54F-40
Case
QFP-44
Date_code
99+
GENERAL DESCRIPTION
The W78E54 is an 8-bit microcontroller that is functionally compatible with the W78C54, except that
the mask ROM is replaced by a flash EEPROM with a size of 16 KB. To facilitate programming and
verification, the flash EEPROM inside the W78E54 allows the program memory to be programmed
and read electronically. Once the code is confirmed, the user can protect the code for security.
The W78E54 microcontroller supplies a wider frequency range than most 8-bit microcontrollers on the
market. It is functionally compatible with the industry-standard 80C52 microcontroller series, except
that one extra 4-bit bit-addressable I/O port (Port 4) and two additional external interrupts ( INT2 ,
The W78E54 contains four 8-bit bidirectional and bit-addressable I/O ports, three 16-bit
timer/counters, and a serial port. These peripherals are supported by a eight-source, two-level
interrupt capability. There are 256 bytes of RAM and an 16 KB flash EEPROM for application
programs.
The W78E54 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
INT3 ).
8-bit CMOS microcontroller
Fully static design
Low standby current at full supply voltage
DC-40 MHz operation
256 bytes of on-chip scratchpad RAM
16 KB electrically erasable/programmable EPROM
64 KB program memory address space
64 KB data memory address space
Four 8-bit bidirectional ports
One extra 4-bit bit-addressable I/O port, additional INT2 / INT3
(available on 44-pin PLCC/QFP package)
Three 16-bit timer/counters
One full duplex serial port
Boolean processor
Eight-source, two-level interrupt capability
Built-in power management
Code protection mechanism
Packages:
DIP 40: W78E54-16/24/40
PLCC 44: W78E54P-16/24/40
TQFP 44: W78E54M-16/24/40
QFP 44: W78E54F-16/24/40
8-BIT MICROCONTROLLER
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Publication Release Date: November 1997
W78E54
Revision A2