W78LE365

The W78LE365 is an 8-bit microcontroller which has an in-system programmable Flash EPROM for firmware updating. The instruction set of the W78LE365 is fully compatible with the standard 8052. The W78LE365 contains a 64K bytes  f main ROM and a 4K bytes of auxiliary ROM which allows the contents of the 64KB main ROM to be updated by the  oader program located at the 4KB auxiliary ROM; 256+1K bytes of on-chip RAM; four 8-bit bi-directional and bit- ddressable I/O ports; an additional 4-bit port P4; three 16-bit timer/counters; a serial port. These peripherals are  upported by a eight sources two-level interrupt capability. To facilitate programming and verification, the ROM inside the W78LE365 allows the program memory to be programmed and read electronically. Once the code is confirmed, the user can protect the code for security.

The W78LE365 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  ower-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.