Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

AT89LS51 Datasheet(PDF) 5 Page - ATMEL Corporation

No. de pieza AT89LS51
Descripción Electrónicos  8-bit Low-Voltage Microcontroller with 4K Bytes In-System Programmable Flash
Download  32 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89LS51 Datasheet(HTML) 5 Page - ATMEL Corporation

  AT89LS51_06 Datasheet HTML 1Page - ATMEL Corporation AT89LS51_06 Datasheet HTML 2Page - ATMEL Corporation AT89LS51_06 Datasheet HTML 3Page - ATMEL Corporation AT89LS51_06 Datasheet HTML 4Page - ATMEL Corporation AT89LS51_06 Datasheet HTML 5Page - ATMEL Corporation AT89LS51_06 Datasheet HTML 6Page - ATMEL Corporation AT89LS51_06 Datasheet HTML 7Page - ATMEL Corporation AT89LS51_06 Datasheet HTML 8Page - ATMEL Corporation AT89LS51_06 Datasheet HTML 9Page - ATMEL Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 32 page
background image
5
3053B–MICRO–3/05
AT89LS51
4.6
Port 3
Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. The Port 3 output buffers can
sink/source four TTL inputs. When 1s are written to Port 3 pins, they are pulled high by the inter-
nal pull-ups and can be used as inputs. As inputs, Port 3 pins that are externally being pulled low
will source current (I
IL) because of the pull-ups.
Port 3 receives some control signals for Flash programming and verification.
Port 3 also serves the functions of various special features of the AT89LS51, as shown in the
following table.
4.7
RST
Reset input. A high on this pin for two machine cycles while the oscillator is running resets the
device. This pin drives High for 98 oscillator periods after the Watchdog times out. The DISRTO
bit in SFR AUXR (address 8EH) can be used to disable this feature. In the default state of bit
DISRTO, the RESET HIGH out feature is enabled.
4.8
ALE/PROG
Address Latch Enable (ALE) is an output pulse for latching the low byte of the address during
accesses to external memory. This pin is also the program pulse input (PROG) during Flash
programming.
In normal operation, ALE is emitted at a constant rate of 1/6 the oscillator frequency and may be
used for external timing or clocking purposes. Note, however, that one ALE pulse is skipped dur-
ing each access to external data memory.
If desired, ALE operation can be disabled by setting bit 0 of SFR location 8EH. With the bit set,
ALE is active only during a MOVX or MOVC instruction. Otherwise, the pin is weakly pulled high.
Setting the ALE-disable bit has no effect if the microcontroller is in external execution mode.
4.9
PSEN
Program Store Enable (PSEN) is the read strobe to external program memory.
When the AT89LS51 is executing code from external program memory, PSEN is activated twice
each machine cycle, except that two PSEN activations are skipped during each access to exter-
nal data memory.
Port Pin
Alternate Functions
P3.0
RXD (serial input port)
P3.1
TXD (serial output port)
P3.2
INT0 (external interrupt 0)
P3.3
INT1 (external interrupt 1)
P3.4
T0 (timer 0 external input)
P3.5
T1 (timer 1 external input)
P3.6
WR (external data memory write strobe)
P3.7
RD (external data memory read strobe)


Número de pieza similar - AT89LS51_06

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
ATMEL Corporation
AT89LS51 ATMEL-AT89LS51_08 Datasheet
496Kb / 31P
   8-bit Low-Voltage Microcontroller with 4K Bytes In-System Programmable Flash
More results

Descripción similar - AT89LS51_06

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
ATMEL Corporation
AT89LS51 ATMEL-AT89LS51 Datasheet
261Kb / 29P
   8-bit Low-Voltage Microcontroller with 4K Bytes In-System Programmable Flash
AT89LS51 ATMEL-AT89LS51_08 Datasheet
496Kb / 31P
   8-bit Low-Voltage Microcontroller with 4K Bytes In-System Programmable Flash
AT89S51 ATMEL-AT89S51 Datasheet
242Kb / 27P
   8-bit Microcontroller with 4K Bytes In-System Programmable Flash
AT89S51 ATMEL-AT89S51_05 Datasheet
416Kb / 32P
   8-bit Microcontroller with 4K Bytes In-System Programmable Flash
AT89S51 ATMEL-AT89S51_08 Datasheet
496Kb / 31P
   8-bit Microcontroller with 4K Bytes In-System Programmable Flash
AT90S4414 ATMEL-AT90S4414 Datasheet
736Kb / 10P
   8-Bit Microcontroller with 4K bytes In-System Programmable Flash
ATTINY45 ATMEL-ATTINY45 Datasheet
300Kb / 25P
   8-bit Microcontroller with 4K Bytes In-System Programmable Flash
ATTINY24A ATMEL-ATTINY24A Datasheet
545Kb / 20P
   8-bit Microcontroller with 2K/4K Bytes In-System Programmable Flash
AT90S2333 ATMEL-AT90S2333 Datasheet
323Kb / 13P
   8-bit Microcontroller with 2K/4K bytes In-System Programmable Flash
ATTINY24A ATMEL-ATTINY24A_10 Datasheet
703Kb / 22P
   8-bit Microcontroller with 2K/4K Bytes In-System Programmable Flash
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com