W78E516B_06 Datasheet, PDF (3/37 Pages) Winbond – 8-BIT MICROCONTROLLER

W78E516B
1. GENERAL DESCRIPTION
The W78E516B is an 8-bit microcontroller which has an in-system programmable Flash EPROM for
firmware updating. The instruction set of the W78E516B is fully compatible with the standard 8052.
The W78E516B 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 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 a eight sources two-level interrupt capability. To
facilitate programming and verification, the Flash EPROM inside the W78E516B allows the program
memory to be programmed and read electronically. Once the code is confirmed, the user can protect
the code for security.
The W78E516B 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.
2. 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
• Packaged in
− Lead Free (ROHS) DIP 40: W78E516B40DL
− Lead Free (ROHS) PLCC 44: W78E516B40PL
− Lead Free (ROHS) PQFP 44: W78E516B40FL
Publication Release Date: December 4, 2006
-3-
Revision A11