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W78C52D-40 Datasheet

  • W78C52D-40

  • 8-BIT MICROCONTROLLER

  • 252.05KB

  • 18頁

  • WINBOND

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Preliminary W78C52D
8-BIT MICROCONTROLLER
GENERAL DESCRIPTION
The W78C52D microcontroller supplies a wider frequency and supply voltage range than most 8-bit
microcontrollers on the market. It is compatible with the industry standard 80C52 microcontroller
series. The W78C52D contains four 8-bit bidirectional parallel ports, one extra 4-bit bit-addressable
I/O port (Port 4) and two additional external interrupts (
INT2
, INT3 ), three 16-bit timer/counters, one
watchdog timer and a serial port. These peripherals are supported by a eight-source, two-level
interrupt capability. There are 256 bytes of RAM and an 8K byte mask ROM for application programs.
The W78C52D 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
鈥?/div>
Supply voltage of 4.5V to 5.5V
鈥?/div>
DC-40 MHz operation
鈥?/div>
256 bytes of on-chip scratchpad RAM
鈥?/div>
8K bytes of on-chip mask ROM
鈥?/div>
64K bytes program memory address space
鈥?/div>
64K bytes data memory address space
鈥?/div>
Four 8-bit bidirectional ports
鈥?/div>
Three 16-bit timer/counters
鈥?/div>
One full duplex serial port
鈥?/div>
Eight
-source, two-level interrupt capability
鈥?/div>
One extra 4-bit bit-addressable I/O port
鈥?/div>
Two additional external interrupts
INT2
/ INT3
鈥?/div>
Watchdog timer
鈥?/div>
EMI reduction mode
鈥?/div>
Built-in power management
鈥?/div>
Code protection
鈥?/div>
Packages:
鈭?/div>
DIP 40: W78C52D-24/40
鈭?/div>
PLCC 44: W78C52DP-24/40
鈭?/div>
QFP 44: W78C52DF-24/40
-1-
Publication Release Date: December 1998
Revision A1

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