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W78L801F

8-BIT MICROCONTROLLER

Winbond 

W78L801

1. GENERAL DESCRIPTION

The W78L801 is an 8-bit microcontroller which can accommodate a wide range of supply voltages

with low power consumption. The instruction set for the W78L801 is fully compatible with the standard

8051. The W78L801 contains an 4K bytes Mask ROM; a 256 bytes RAM; four 8-bit bi-directional and

bit-addressable I/O ports; an additional 6-bit I/O port P4; two 16-bit timer/counters; a hardware

watchdog timer. These peripherals are supported by a twelve sources two-level interrupt capability.

The W78L801 does not contain serial port.

The W78L801 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.

2. FEATURES

y Fully static design 8-bit CMOS microcontroller

y Wide supply voltage of 1.8V to 5.5V

y DC-24 MHz operation

y 256 bytes of on-chip scratchpad RAM

y 4 KB Mask-ROM

y 64 KB program memory address space

y 64 KB data memory address space

y Four 8-bit bi-directional ports; Port 0 has internal pull-up resisters enabled by software

y Two 16-bit timer/counters

y Watchdog Timer

y Direct LED drive outputs

y Twelve sources, two-level interrupt capability

y Wake-up via external interrupts at Port 1

y EMI reduction mode

y Built-in power management

y Code protection mechanism

y Packages:

− DIP 40:

W78L801-24

− PLCC 44: W78L801P-24

− PQFP 44: W78L801F-24

− Lead Free (RoHs)DIP 40: W78L801A24DL

− Lead Free (RoHs)PLCC 44: W78L801A24PL

− Lead Free (RoHs)PQFP 44: W78L801A24FL

− Lead Free (RoHs)LQFP 48: W78L801A24LL

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