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W78L33 Datasheet

  • W78L33

  • 14頁(yè)

  • ETC

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W78L33
8-BIT MICROCONTROLLER
GENERAL DESCRIPTION
The W78L33 microcontroller supplies a wider frequency range and supply voltages than most 8-bit
microcontrollers on the market. It is functional compatible with the industry standard 80C32
microcontroller series except the one extra 4-bit bit-addressable I/O port (Port 4). The W78L33
contains four 8-bit bidirectional parallel ports, three 16-bit timer/counters and a serial port. These
peripherals are supported by a six-source, two-level interrupt capability. There are 256 bytes of RAM,
and the device supports ROMless operation for application programs.
The W78L33 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
鈥?/div>
Fully static design 8-bit CMOS microcontroller
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Supply voltage of 1.8V to 5.5V
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DC-24 MHz operation
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256 bytes of on-chip scratchpad RAM
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ROMless operation
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64K bytes program memory address space
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64K bytes data memory address space
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Four 8-bit bidirectional ports
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Three 16-bit timer/counters
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One full duplex serial port
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Boolean processor
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Six-
sources, two-level interrupt capability
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Built-in power management
鈥?/div>
One extra 4-bit bit-addressable I/O port
鈥?/div>
Packages:
鈭?/div>
PLCC 44: W78L33P-24
鈭?/div>
QFP 44: W78L33F-24
-1-
Publication Release Date: September 1998
Revision A1

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