80C51 Microcontroller - 12T

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.

• 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