W78E516DDG Datasheet, PDF (4/90 Pages) Nuvotem Talema – 8-BIT MICROCONTROLLER

W78E516D/W78E058D Data Sheet
1 GENERAL DESCRIPTION
The W78E516D/W78E058D series is an 8-bit microcontroller which has an in-system programmable
Flash EPROM for on-chip firmware updating.
The instruction sets of the W78E516D/W78E058D are fully compatible with the standard 8052. The
W78E516D/W78E058D series contains a 64K/32K bytes of main Flash EPROM and a 4K bytes of
auxiliary Flash EPROM which allows the contents of the 64K/32K bytes main Flash EPROM to be up-
dated by the loader program located in the 4K bytes Flash EPROM; a 256 bytes of SRAM; 256 bytes
of AUXRAM; 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 8 sources 2-level interrupt
capability. To facilitate programming and verification, the Flash EPROM inside the
W78E516D/W78E058D series allows the program memory to be programmed and read electronically.
Once the code is confirmed, the user can protect the code for security.
The W78E516D/W78E058D series 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.
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