W78L54 Datasheet | Winbond

DESCRIPTION The W78L54 microcontroller supplies a wider frequency and supply voltage range than most 8-bit microcontrollers on the market. It is patible with the industry standard 80C54 microcontroller series. The W78L54 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 16K byte mask ROM for application programs. The W78L54 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 - 16K 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 / INT3 - Watchdog timer - EMI reduction mode - Built-in power management - Code protection - Packages: - DIP 40: W78L54-24 - PLCC 44: W78L54P-24 - QFP 44: W78L54F-24 -1- Publication Release Date: Sep. 1998 Revision...