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 set of the W78E516D/W78E058D is 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 updated 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. Features Fully static design 8-bit CMOS microcontroller ( up to 40MHz ) Optional 12T or 6T mode Wide supply voltage of 2.4 to 5.5V Max operation frequency up to 40Mhz@12T mode 64K/32K bytes of in-system programmable FLASH EPROM for Application Program(APROM) 4K bytes of auxiliary FLASH EPROM for Loader Program(LDROM) Low standby current at full supply voltage 512 bytes of on-chip RAM. (includ e 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 with high sink current for LED driver One 4-bit multipurpose programmable port, additional INT2/ INT3 Support Watch Dog Timer Three 16-bit timer/counters One full duplex serial port 8 -sources, 2-level interrupt capability Software Reset Built-in power management with idle mode and power down mode Code protection
