W78L52

W78L52 8-BIT MICROCONTROLLER GENERAL DESCRIPTION The W78L52 microcontroller supplies a wider frequency and supply voltage range than most 8-bit microcontrollers on the market. It is compatible with the industry standard 80C52 microcontroller series. The W78L52 contains four 8-bit bidirectional parallel ports, one extra 4-bit bit-addressable I/O port (Port 4) and two additional external interrupts ( INT2 , INT3 ), three 16-bit timer/counters, one watchdog timer and a serial port. These peripherals are supported by a eight-source, two-level interrupt capability. There are 256 bytes of RAM and an 8K byte mask ROM for application programs. The W78L52 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 Supply voltage of 1.8V to 5.5V DC-24 MHz operation 256 bytes of on-chip scratchpad RAM 8K bytes of on-chip mask ROM 64K bytes program memory address space 64K bytes data memory address space Four 8-bit bidirectional ports Three 16-bit timer/counters One full duplex serial port Eight-source, two-level interrupt capability One extra 4-bit bit-addressable I/O port Two additional external interrupts INT2 /...