8KB 256Byte FLASH 51Series 40MHz PQFP-44(10x10) Microcontroller Units (MCUs/MPUs/SOCs)

ROHS

Specifications

Description

The W78E054D/W78E052D series is an 8-bit microcontroller which can accommodate a wider frequency range with low power consumption. The instruction set for the W78E054D/W78E052D series is fully compatible with the standard 8052.

The W78E054D/W78E052D series contains 16K/8K bytes Flash EPROM programmable by hardware writer; a 256 bytes RAM; four 8-bit bi-directional (P0, P1, P2, P3) and bit-addressable I/O ports; an additional 4-bit I/O port P4; three 16-bit timer/counters; a hardware watchdog timer and a serial port. These peripherals are supported by 8 sources 4-level interrupt capability. To facilitate programming and verification, the Flash EPROM inside the W78E054D/W78E052D series allows the program memory to be programmed and read electronically. Once the code is confirmed, the user can protect the code for security.

The W78E054D/W78E052D series 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. The W78E054D/W78E052D series contains In-System Programmable (ISP) 2KB LDROM for loader program, operating voltage from 3.3V to 5.5V

PARTS INFORMATION LIST

Features

 Fully static design 8-bit CMOS microcontroller

 Optional 12T or 6T mode

 12T Mode, 12 clocks per machine cycle operation (default), Speed up to 40 MHz/5V

 6T Mode, 6 clocks per machine cycle operation set by the writer, Speed up to 20 MHz/5V

 Wide supply voltage of 2.4V to 5.5V

 Temperature grade is (-40oC~85oC)

 Pin and Instruction-sets compatible with MCS-51

 256 bytes of on-chip scratchpad RAM

 16K/8K bytes electrically erasable/programmable Flash EPROM

 2K bytes LDROM support ISP function (Reference Application Note)

 64KB program memory address space

 64KB data memory address space

 Four 8-bit bi-directional ports

 8-sources, 4-level interrupt capability

 One extra 4-bit bit-addressable I/O port, additional INT2 / INT3 (available on PQFP, PLCC and LQFP package)

 Three 16-bit timer/counters

 One full duplex serial port

 Watchdog Timer

 EMI reduction mode

 Software Reset

 Built-in power management with idle mode and power down mode

 Code protection

 Packages: DIP40, PLCC44, PQFP44, LQFP48, TQFP44

Applications

This application note illustrates the in-system programmability of the microcontroller. In this example, microcontroller will boot from 2K LDROM bank enter in-system programming mode for programming the contents of APROM, this sample to Erase APROM, Erase Verify APROM, Read one byte for APROM, Write one byte for APROM, Read CID/DID. .

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