W78C801
Model | W78C801 |
Description | 8-BIT MICROCONTROLLER |
PDF file | Total 18 pages (File size: 245K) |
Chip Manufacturer | WINBOND |
W78C801
8-BIT MICROCONTROLLER
GENERAL DESCRIPTION
The W78C801 is an 8-bit microcontroller which can accommodate a wide frequency range with low
power consumption. The instruction set for the W78C801 is fully compatible with the standard 8051.
The W78C801 contains an 4K bytes Mask ROM; a 256 bytes RAM; four 8-bit bi-directional and bit-
addressable I/O ports; an additional 6-bit I/O port P4; two 16-bit timer/counters; a hardware watchdog
timer. These peripherals are supported by a twelve sources two-level interrupt capability. The
W78C801 does not contain serial port.
The W78C801 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
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DC-40 MHz operation
•
256 bytes of on-chip scratchpad RAM
•
4 KB Mask-ROM
•
64 KB program memory address space
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64 KB data memory address space
•
Four 8-bit bi-directional ports
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Two 16-bit timer/counters
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Watchdog Timer
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Direct LED drive outputs
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Twelve sources, two-level interrupt capability
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Wake-up via external interrupts at Port 1
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EMI reduction mode
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Built-in power management
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Code protection mechanism
•
Packages:
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DIP 40: W78C801-24/40
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PLCC 44: W78C801P-24/40
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PQFP 44: W78C801F-24/40
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Publication Release Date: February 1999
Revision A3