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W78C52D Datasheet, PDF (1/18 Pages) Winbond – 8-BIT MICROCONTROLLER | |||
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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
⢠Fully static design
⢠Supply voltage of 4.5V to 5.5V
⢠DC-40 MHz operation
⢠256 bytes of on-chip scratchpad RAM
⢠8K bytes of on-chip mask ROM
⢠64K bytes program memory address space
⢠64K bytes data memory address space
⢠Four 8-bit bidirectional ports
⢠Three 16-bit timer/counters
⢠One full duplex serial port
⢠Eight-source, two-level interrupt capability
⢠One extra 4-bit bit-addressable I/O port
⢠Two additional external interrupts INT2 / INT3
⢠Watchdog timer
⢠EMI reduction mode
⢠Built-in power management
⢠Code protection
⢠Packages:
â DIP 40: W78C52D-24/40
â PLCC 44: W78C52DP-24/40
â QFP 44: W78C52DF-24/40
Publication Release Date: December 1998
-1-
Revision A1
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