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W78LE812 Datasheet(PDF) 1 Page - Winbond

No. de pieza W78LE812
Descripción Electrónicos  8-BIT MTP MICROCONTROLLER
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Fabricante Electrónico  WINBOND [Winbond]
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W78LE812 Datasheet(HTML) 1 Page - Winbond

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W78LE812
8-BIT MTP MICROCONTROLLER
Publication Release Date: February 1999
- 1 -
Revision A2
GENERAL DESCRIPTION
The W78LE812 is an 8-bit microcontroller which can accommodate a wide range of supply voltages
with low power consumption. The instruction set for the W78LE812 is fully compatible with the
standard 8051. The W78LE812 contains an 8K bytes MTP ROM (Multiple-Time Programmable
ROM); a 256 bytes RAM; four 8-bit bi-directional and bit-addressable I/O ports; an additional 6-bit I/O
port P4; three 16-bit timer/counters; a hardware watchdog timer and a serial port. These peripherals
are supported by a fourteen sources two-level interrupt capability. To facilitate programming and
verification, the MTP-ROM inside the W78LE812 allows the program memory to be programmed and
read electronically. Once the code is confirmed, the user can protect the code for security.
The W78LE812 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 8-bit CMOS microcontroller
Wide supply voltage of 2.4V to 5.5V
256 bytes of on-chip scratchpad RAM
8 KB electrically erasable/programmable MTP-ROM
64 KB program memory address space
64 KB data memory address space
Four 8-bit bi-directional ports
Three 16-bit timer/counters
Timer 2 Clock-out
One full duplex serial port(UART)
Watchdog Timer
Direct LED drive outputs
Fourteen sources, two-level interrupt capability
Wake-up via external interrupts at Port 1
EMI reduction mode
Built-in power management
Code protection mechanism
Packages:
− DIP 40: W78LE812-24
− PLCC 44: W78LE812P-24
− PQFP 44: W78LE812F-24


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