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W78LE54C Dataheets PDF



Part Number W78LE54C
Manufacturers Winbond
Logo Winbond
Description 8-BIT MICROCONTROLLER
Datasheet W78LE54C DatasheetW78LE54C Datasheet (PDF)

W78LE54C/W78L054C 8-BIT MICROCONTROLLER Table of Contents1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. GENERAL DESCRIPTION 2 FEATURES .... 2 PIN CONFIGURATIONS ... 3 P.

  W78LE54C   W78LE54C


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W78LE54C/W78L054C 8-BIT MICROCONTROLLER Table of Contents1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. GENERAL DESCRIPTION ......................................................................................................... 2 FEATURES ................................................................................................................................. 2 PIN CONFIGURATIONS ............................................................................................................ 3 PIN DESCRIPTION..................................................................................................................... 4 FUNCTIONAL DESCRIPTION ................................................................................................... 5 SECURITY BITS ....................................................................................................................... 10 ABSOLUTE MAXIMUM RATINGS ........................................................................................... 11 DC CHARACTERISTICS.......................................................................................................... 12 AC CHARACTERISTICS .......................................................................................................... 14 TIMING WAVEFORMS ............................................................................................................. 16 TYPICAL APPLICATION CIRCUITS ........................................................................................ 18 PACKAGE DIMENSIONS ......................................................................................................... 20 REVISION HISTORY ................................................................................................................ 22 -1- Publication Release Date: December 4, 2006 Revision A3 www.DataSheet.in W78LE54C/W78L054C 1. GENERAL DESCRIPTION The W78L054C is an 8-bit microcontroller which can accommodate a wide supply voltage range with low power consumption. The instruction set for the W78L054C is fully compatible with the standard 8051. The W78L054C contains an 16K bytes Flash EPROM; a 256 bytes RAM; four 8-bit bi-directional and bit-addressable I/O ports; an additional 4-bit I/O port P4; three 16-bit timer/counters; a hardware watchdog timer and a serial port. These peripherals are supported by eight sources two-level interrupt capability. To facilitate programming and verification, the Flash EPROM inside the W78L054C allows the program memory to be programmed and read electronically. Once the code is confirmed, the user can protect the code for security. The W78L054C 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 • Fully static design 8-bit CMOS microcontroller • Wide supply voltage of 2.4V to 5.5V • 256 bytes of on-chip scratchpad RAM • 16 KB electrically erasable/programmable Flash EPROM • 64 KB program memory address space • 64 KB data memory address space • Four 8-bit bi-directional ports • One extra 4-bit bit-addressable I/O port, additional INT2 / INT3 (available on 44-pin PLCC/QFP package) • Three 16-bit timer/counters • One full duplex serial port(UART) • Watchdog Timer • Eight sources, two-level interrupt capability • EMI reduction mode • Built-in power management • Code protection mechanism • Packages: − Lead Free (RoHS) DIP 40: W78L054C24DL − Lead Free (RoHS) PLCC 44: W78L054C24PL − Lead Free (RoHS) PQFP 44: W78L054C24FL -2- www.DataSheet.in W78LE54C/W78L054C 3. PIN CONFIGURATIONS -3- Publication Release Date: December 4, 2006 Revision A3 www.DataSheet.in W78LE54C/W78L054C 4. PIN DESCRIPTION SYMBOL DESCRIPTIONS EA 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. 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. ADDRESS LATCH ENABLE: ALE is used to enable the address latch that separates the address from the data on Port 0. 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. PORT 0: Port 0 is a bi-directional I/O port which also provides a multiplexed low orde.


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