W78  -  系列元器件数据手册
W78E516B  -  8-bit microcontroller which has an in-system programmable Flash EPROM for firmware updating  -  Nuvoton Technology Corporation  -  8051

Description
The W78E516B is an 8-bit microcontroller which has an in-system programmable Flash EPROM for firmware updating. The instruction set of the W78E058B is fully compatible with the standard 8052. The W78E516B contains a 64K bytes of main ROM and a 4K bytes of auxiliary ROM which allows the contents of the 32KB main ROM to be updated by the loader program located at the 4KB auxiliary ROM; 512 bytes of on-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 an eight sources two-level interrupt capability.

Features
Fully static design 8-bit CMOS microcontroller up to 40 MHz.
64K bytes of in-system programmable Flash EPROM for Application Program (APROM).
4K bytes of auxiliary Flash EPROM for Loader Program (LDROM).
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
Six-sources, two-level interrupt capability
Built-in power management
Code protection