W78E52BF-40 WINBOND [Winbond], W78E52BF-40 Datasheet
W78E52BF-40
Related parts for W78E52BF-40
W78E52BF-40 Summary of contents
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... 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: DIP 40: W78E52B-24/40 PLCC 44: W78E52BP-24/40 PQFP 44: W78E52BF-24/40 Preliminary W78E52B 8-BIT MTP MICROCONTROLLER Publication Release Date: December 1998 - 1 - Revision A1 ...
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... ALE 12 29 INT0, P3.2 PSEN 13 28 P2.7, A15 INT1, P3.3 14 T0, P3.4 27 P2.6, A14 15 T1, P3.5 26 P2.5, A13 16 WR, P3.6 25 P2.4, A12 17 24 P2.3, A11 RD, P3 P2.2, A10 XTAL2 XTAL1 19 22 P2. VSS 21 P2.0, A8 44-Pin QFP (W78E52BF P1.5 P0.4, AD4 39 38 P1.6 P0.5, AD5 37 P1.7 P0.6, AD6 RST 36 P0.7, AD7 RXD, P3 ...
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PIN DESCRIPTION SYMBOL EXTERNAL ACCESS ENABLE: This pin forces the processor to execute out of EA external ROM. It should be kept high to access internal ROM. The ROM address and data will not be presented on the bus if ...
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BLOCK DIAGRAM P1.0 ~ Port Port 1 1 P1.7 Latch INT2 Interrupt INT3 Timer 2 Timer 0 Timer 1 UART P3.0 Port 3 Port ~ 3 P3.7 Latch Port 4 P4.0 Latch Port ~ 4 P4.3 XTAL1 FUNCTIONAL DESCRIPTION The ...
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The operations of Timer 0 and Timer 1 are the same as in the W78C51. Timer special feature of the W78E54B 16-bit timer/counter that is configured and controlled by the T2CON register. Like Timers ...
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PORT4 Another bit-addressable port P4 is also available and only 4 bits (P4<3:0>) can be used. This port address is located at 0D8H with the same function as that of port P1, except the P4.3 and P4.2 are alternative ...
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The power-off flag is located at PCON.4. This bit is set when V be used to determine if a reset is a warm boot or a cold boot subsequently reset by software. Watchdog Timer The Watchdog timer ...
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Before Watchdog time-out occurs, the program must clear the 14-bit timer by writing 1 to WDTC.6 (CLRW). After 1 is written to this bit, the 14-bit timer, prescaler and this bit will be reset on the next instruction cycle. The ...
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Power-down Mode When the PD bit of the PCON register is set, the processor enters the power-down mode. In this mode all of the clocks are stopped, including the oscillator. The only way to exit power-down mode ...
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Program/Erase Inhibit Operation This operation allows parallel erasing or programming of multiple chips with different data. When P3. P3. except for the P3.6 and P3.7 pins, the individual chips may ...
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Reserved Lock bit, logic 0 : active B1 : MOVC inhibit, logic 0 : the MOVC instruction ...
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P3.7 IH X'tal1 X'tal2 Vss Programming Configuration ABSOLUTE MAXIMUM RATINGS PARAMETER DC Power Supply Input Voltage Operating Temperature Storage Temperature ...
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DC Characteristics, continued PARAMETER Input Leakage Current P0, EA Output Low Voltage P1, P2, P3 Output Low Voltage (*3) ALE, PSEN , P0 Output High Voltage P1, P2, P3 Output High Voltage (*3) ALE, PSEN , P0 Input Low Voltage ...
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AC CHARACTERISTICS The AC specifications are a function of the particular process used to manufacture the part, the ratings of the I/O buffers, the capacitive load, and the internal routing capacitance. Most of the specifications can be expressed in terms ...
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Data Read Cycle PARAMETER ALE Low to RD Low RD Low to Data Valid Data Hold from RD High Data Float from RD High RD Pulse Width Notes: 1. Data memory access time " ...
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Program Operation, continued PARAMETER CE Program Pulse Width for Program Operation OECTRL Setup Time OECTRL Hold Time OE Setup Time OE High to Output Float Data Valid from OE Note: Flash data can be accessed only in flash mode. The ...
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Timing Waveforms, continued Data Read Cycle S4 S5 XTAL1 ALE PSEN PORT 2 A0-A7 PORT 0 RD Data Write Cycle S4 XTAL1 ALE PSEN PORT 2 PORT 0 A0- A8-A15 DATA T T DAR ...
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Timing Waveforms, continued Port Access Cycle XTAL1 ALE T PDS PORT INPUT SAMPLE Program Operation V P2 (A15... A0 P3 (CE P3.3 IH (OECTRL P3 ...
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TYPICAL APPLICATION CIRCUITS Expanded External Program Memory and Crystal XTAL1 XTAL2 CRYSTAL 8 RST C1 C2 INT0 12 13 INT1 P1.0 2 P1.1 ...
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Typical Application Circuits, continued Expanded External Data Memory and Oscillator OSCILLATOR 8 W78E52B 39 AD0 3 P0.0 ...
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PACKAGE DIMENSIONS 40-pin DIP 44-pin PLCC Seating Plane ...
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Package Dimensions, continued 44-pin PQFP See Detail F Seating Plane Headquarters No. 4, Creation Rd. III, Science-Based Industrial Park, Hsinchu, Taiwan TEL: 886-3-5770066 FAX: 886-3-5792766 http://www.winbond.com.tw/ Voice & Fax-on-demand: ...