W78C51DP-24
| Model | W78C51DP-24 |
| Description | 8-BIT MICROCONTROLLER |
| PDF file | Total 18 pages (File size: 253K) |
| Chip Manufacturer | WINBOND |
Preliminary W78C51D
8-BIT MICROCONTROLLER
GENERAL DESCRIPTION
The W78C51D microcontroller supplies a wider frequency and supply voltage range than most 8-bit
microcontrollers on the market. It is compatible with the industry standard 80C51 microcontroller
series.
The W78C51D 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 ), two 16-bit timer/counters, one watchdog
timer and a serial port. These peripherals are supported by a seven-source, two-level interrupt
capability. There are 128 bytes of RAM and an 4K byte mask ROM for application programs.
The W78C51D 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
•
128 bytes of on-chip scratchpad RAM
•
4K bytes of on-chip mask ROM
•
64K bytes program memory address space
•
64K bytes data memory address space
•
Four 8-bit bidirectional ports
•
Two 16-bit timer/counters
•
One full duplex serial port
•
Seven
-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:
−
DIP 40: W78C51D-24/40
−
PLCC 44: W78C51DP-24/40
−
QFP 44: W78C51DF-24/40
-1-
Publication Release Date: January 1999
Revision A1
