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W78L801 Dataheets PDF



Part Number W78L801
Manufacturers Winbond
Logo Winbond
Description 8-BIT MICROCONTROLLER
Datasheet W78L801 DatasheetW78L801 Datasheet (PDF)

W78L801 8-BIT MICROCONTROLLER 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 .

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W78L801 8-BIT MICROCONTROLLER 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. FEATURES • Fully static design 8-bit CMOS microcontroller • Wide supply voltage of 1.8V to 5.5V • DC-24 MHz operation • 256 bytes of on-chip scratchpad RAM • 4 KB Mask-ROM • 64 KB program memory address space • 64 KB data memory address space • Four 8-bit bi-directional ports • Two 16-bit timer/counters • Watchdog Timer • Direct LED drive outputs • Twelve sources, two-level interrupt capability • Wake-up via external interrupts at Port 1 • EMI reduction mode • Built-in power management • Code protection mechanism • Packages: − DIP 40: W78L801-24 − PLCC 44: W78L801P-24 − PQFP 44: W78L801F-24 -1- Publication Release Date: February 1999 Revision A3 W78L801 PIN CONFIGURATIONS 40-Pin DIP (W78L801) INT2, P1.0 INT3, P1.1 INT4,P1.2 INT5,P1.3 INT6,P1.4 INT7,P1.5 INT8,P1.6 INT9,P1.7 RST P3.0 P3.1 INT0, P3.2 INT1, P3.3 T0, P3.4 T1, P3.5 WR, P3.6 RD, P3.7 XTAL2 XTAL1 VSS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 VDD P0.0, AD0 P0.1, AD1 P0.2, AD2 P0.3, AD3 P0.4, AD4 P0.5, AD5 P0.6, AD6 P0.7, AD7 EA ALE,P4.5 PSEN,P4.6 P2.7, A15 P2.6, A14 P2.5, A13 P2.4, A12 P2.3, A11 P2.2, A10 P2.1, A9 P2.0, A8 44-Pin PLCC (W78L801P) 44-Pin QFP (W78L801F) I N T 6 , P 1 . 4 I N T 5 , P 1 . 3 I N T 4 , P 1 . 2 I N T 3 , P 1 . 1 I N T 2 , P 1 . 0 A D 0 , P P 4 V 0 . D . 2 D 0 A D 1 , P 0 . 1 A D 2 , P 0 . 2 A D 3 , P 0 . 3 I N T 6 , P 1 . 4 I N T 5 , P 1 . 3 I N T 4 , P 1 . 2 I N T 3 , P 1 . 1 I N T 2 , P 1 . 0 A D 0 , P P 4 V 0 . D . 2 D 0 A D 1 , P 0 . 1 A D 2 , P 0 . 2 A D 3 , P 0 . 3 INT7,P1.5 INT8,P1.6 INT9,P1.7 RS T P3.0 P4.3 P3.1 INT0, P3.2 INT1, P3.3 T0, P3.4 T1, P3.5 6 5 4 3 2 1 44 43 42 41 40 7 39 8 38 9 37 10 36 11 35 12 34 13 33 14 32 15 31 16 30 17 29 18 19 20 21 22 23 24 25 26 27 28 P 3 . 6 , / W R P 3 . 7 , / R D X T A L 2 X V P P T S 4 2 A S . . L 0 0 1 , A 8 P 2 . 1 , A 9 P 2 . 2 , A 1 0 P 2 . 3 , A 1 1 P 2 . 4 , A 1 2 P0.4, AD4 P0.5, AD5 P0.6, AD6 P0.7, AD7 EA P4.1 ALE,P4.5 PSEN, P4.6 P2.7, A15 P2.6, A14 P2.5, A13 INT7, P1.5 INT8, P1.6 INT9, P1.7 RST P3.0 P4.3 P3.1 INT0, P3.2 INT1, P3.3 T0, P3.4 T1, P3.5 1 2 44 43 42 41 40 39 38 37 36 35 34 33 32 31 3 30 4 29 5 28 6 27 7 8 26 9 25 10 24 11 23 12 13 14 15 16 17 18 19 20 21 22 P 3 . 6 , / W R P 3 . 7 , / R D X T A L 2 X V P P T S 4 2 A S . . L 0 0 1 , A 8 P 2 . 1 , A 9 P 2 . 2 , A 1 0 P 2 . 3 , A 1 1 P 2 . 4 , A 1 2 P0.4, AD4 P0.5, AD5 P0.6, AD6 P0.7, AD7 EA P4.1 ALE, P4.5 PSEN, P4.6 P2.7, A15 P2.6, A14 P2.5, A13 -2- W78L801 PIN DESCRIPTION SYMBOL EA DESCRIPTIONS EXTERNAL ACCESS ENABLE: This pin forces the processor to execute out of external ROM. It should be kept high to access internal ROM. The ROM address and data will not be presented on the bus if EA pin is high and the program counter is within on-chip ROM area. Otherwise they will be presented on the bus. PROGRAM STORE ENABLE: PSEN enables the external ROM data onto the Port 0 address/ data bus during fetch and MOVC operations. When internal ROM access is performed, no PSEN strobe signal outputs from this pin. This pin also serves the alternative function P4.6. ADDRESS LATCH ENABLE: ALE is used to enable the address latch that separates the address from the data on Port 0. This pin also serves the alternative function P4.5 RESET: A high on this pin for two machine cycles while the oscillator is running resets the device. CRYSTAL1: This is the crystal oscillator input. This pin may be driven by an external clock. CRYSTAL2: This is the crystal oscillator output. It is the inversion of XTAL1. GROUND: Ground potential POWER SUPPLY: Supply voltage for operation. PSEN ALE RST XTAL1 XTAL2 VSS VDD P0.0−P0.7 PORT 0: Port 0 is a bi-directional I/O port which also provides a multiplexed low order address/data bus during accesses to external memory. The pins of Port 0 can be individually configured to open-drain or standard port with internal pull-ups. P1.0−P1.7 PORT 1: Port 1 is a bi-directional I/O port with internal pull-ups. The bits have alternate functions wh.


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