W78E052DDG 8051 Microcontroller (Pack of 5)


The W78E054D/W78E052D series is an 8-bit microcontroller which can accommodate a wider fre-
quency 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 ad-
ditional 4-bit I/O port P4; three 16-bit timer/counters; a hardware watchdog timer and a serial port. The-
se 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

Out of stock


Main Features of MCS51(8051) Architecture

  • 8-bit arithmetic logic unit (ALU) and accumulator,
  • 4 fast switchable register banks with 8 registers each (memory mapped)
  • Fast interrupt with optional register bank switching
  • Interrupts and threads with selectable priority
  • Dual 16-bit address bus
  • 4 KiB of on-chip ROM, with a 16-bit (64 KiB) address space (PMEM). Not included on 803X variants
  • Four 8-bit bi-directional input/output port, bit addressable
  • UART (serial port)
  • Two 16-bit Counter/timers
  • Power saving mode (on some derivatives)


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