Description The W78E054C is an 8-bit microcontroller which is fully compatible with the standard 8051. The W78E054C contains an 16K bytes Flash EPROM; a 128 bytes RAM; four 8-bit bi-directional and bit-addressable I/O ports; an additional 4-bit I/O port P4; two 16-bit timer/counters; a hardware watchdog timer and a serial port. Features Fully static design 8-bit CMOS microcontroller Wide supply voltage of 4.5V to 5.5V 128 bytes of on-chip scratchpad RAM 16 KB On-chip Flash EPROM 64 KB program memory address space 64 KB data memory address space Four 8-bit bi-directional ports One extra 4-bit bit-addressable I/O port(available on 44-pin PLCC/QFP package) Two 16-bit timer/counters One full duplex serial port(UART) Watchdog Timer Seven sources, two-level interrupt capability EMI reduction mode Built-in power management Code protection mechanism
