NUVOTON W78E051DFG

The W78E054D/W78E052D/W78E051D series is an 8-bit microcontroller which can accommodate a wider frequency range with low power consumption. The instruction set for the W78E054D/ W78E052D/ W78E051D series is fully compatible with the standard 8052. The W78E054D/W78E052D/W78E051D series contains 16K/8K/4K 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/W78E051D 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/W78E051D 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/W78E051D series contains InSystem Programmable (ISP) 2KB LDROM for loader program, operating voltage from 3.3V to 5.5V.

• 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 (-40℃~85℃)
• Pin and Instruction-sets compatible with MCS-51
• 256 bytes of on-chip scratchpad RAM
• 16K/8K/4K 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

• External program memory and crystal oscillator
• Extended external data memory and oscillator
• Internal program memory and oscillator for EFT applications
• Crystal oscillator reference values