GENERAL DESCRIPTION
The W78L516 is an 8-bit microcontroller which hasan in-system programmable Flash EPROM for firmware updating. The instruction set of the W78L516 is fully compatible with the standard 8052. The W78L516 contains a 64K bytes of main Flash EPROM and a 4K bytes of auxiliary Flash EPROM which allows the contents of the 64KB main Flash EPROM to be updated by the loader program located at the 4KB auxiliary Flash EPROM; 512 bytes ofon-chip RAM; four 8-bit bi-directional and bit addressable I/O ports; an additional 4-bit port P4; three 16-bit timer/counters; a serial port. These peripherals are supported by a eight sources two-level interrupt capability.

FEATURES
•  Fully static design 8-bit CMOS microcontroller
•  64K bytes of in-system programmable Flash EPROM for Application Program (AP FLASH EPROM)
•  4K bytes of auxiliary Flash EPROM for Loader Program (LD FLASH EPROM)
•  512 bytes of on-chip RAM. (including 256 bytes of AUX-RAM, software selectable)
•  64K bytes program memory address space and 64K bytes data memory address space
•  Four 8-bit bi-directional ports
•  One 4-bit multipurpose programmable port
•  Three 16-bit timer/counters
•  One full duplex serial port
•  Eight-sources, two-level interrupt capability
•  Built-in power management
•  Code protection
•  Packaged in
− Lead Free(RoHS) DIP  40: W78L516A24DL
− Lead Free(RoHS) PLCC 44: W78L516A24PL
− Lead Free(RoHS) QFP 44: W78L516A24FL
− Lead Free(RoHS) LQFP 48: W78L516A24LL