Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

AT89C51AC3-RLTUM Datasheet(PDF) 9 Page - ATMEL Corporation

Part # AT89C51AC3-RLTUM
Description  Enhanced 8-bit Microcontroller with 64KB Flash Memory
Download  140 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51AC3-RLTUM Datasheet(HTML) 9 Page - ATMEL Corporation

Back Button AT89C51AC3-RLTUM Datasheet HTML 5Page - ATMEL Corporation AT89C51AC3-RLTUM Datasheet HTML 6Page - ATMEL Corporation AT89C51AC3-RLTUM Datasheet HTML 7Page - ATMEL Corporation AT89C51AC3-RLTUM Datasheet HTML 8Page - ATMEL Corporation AT89C51AC3-RLTUM Datasheet HTML 9Page - ATMEL Corporation AT89C51AC3-RLTUM Datasheet HTML 10Page - ATMEL Corporation AT89C51AC3-RLTUM Datasheet HTML 11Page - ATMEL Corporation AT89C51AC3-RLTUM Datasheet HTML 12Page - ATMEL Corporation AT89C51AC3-RLTUM Datasheet HTML 13Page - ATMEL Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 140 page
background image
9
AT89C51AC3
4383D–8051–02/08
Figure 3. Port 2 Structure
Notes:
1. Port 2 is precluded from use as general-purpose I/O Ports when as address/data bus
drivers.
2. Port 2 internal strong pull-ups FET (P1 in FiGURE) assist the logic-one output for
memory bus cycle.
When Port 0 and Port 2 are used for an external memory cycle, an internal control signal
switches the output-driver input from the latch output to the internal address/data line.
Read-Modify-Write
Instructions
Some instructions read the latch data rather than the pin data. The latch based instruc-
tions read the data, modify the data and then rewrite the latch. These are called "Read-
Modify-Write" instructions. Below is a complete list of these special instructions (see
Table ). When the destination operand is a Port or a Port bit, these instructions read the
latch rather than the pin:
It is not obvious the last three instructions in this list are Read-Modify-Write instructions.
These instructions read the port (all 8 bits), modify the specifically addressed bit and
D
Q
P2.X
LATCH
INTERNAL
WRITE
TO
LATCH
READ
PIN
READ
LATCH
0
1
P2.x (1)
ADDRESS HIGH/ CONTROL
BUS
VDD
INTERNAL
PULL-UP (2)
Instruction
Description
Example
ANL
logical AND
ANL P1, A
ORL
logical OR
ORL P2, A
XRL
logical EX-OR
XRL P3, A
JBC
jump if bit = 1 and clear bit
JBC P1.1, LABEL
CPL
complement bit
CPL P3.0
INC
increment
INC P2
DEC
decrement
DEC P2
DJNZ
decrement and jump if not zero
DJNZ P3, LABEL
MOV Px.y, C
move carry bit to bit y of Port x
MOV P1.5, C
CLR Px.y
clear bit y of Port x
CLR P2.4
SET Px.y
set bit y of Port x
SET P3.3


Similar Part No. - AT89C51AC3-RLTUM

ManufacturerPart #DatasheetDescription
logo
ATMEL Corporation
AT89C51AC3-RLTUM ATMEL-AT89C51AC3-RLTUM Datasheet
1Mb / 143P
   Enhanced 8-bit Microcontroller with 64KB Flash Memory
More results

Similar Description - AT89C51AC3-RLTUM

ManufacturerPart #DatasheetDescription
logo
ATMEL Corporation
AT89C51AC3 ATMEL-AT89C51AC3_05 Datasheet
1Mb / 143P
   Enhanced 8-bit Microcontroller with 64KB Flash Memory
AT89C51AC3 ATMEL-AT89C51AC3 Datasheet
1Mb / 141P
   Enhanced 8-bit Microcontroller with 64KB Flash Memory
AT89LP51ED2-20JU ATMEL-AT89LP51ED2-20JU Datasheet
809Kb / 26P
   8-bit Flash Microcontroller with 64KB Program Memory
AT89C51AC2 ATMEL-AT89C51AC2_06 Datasheet
1Mb / 121P
   Enhanced 8-bit Microcontroller with 32 KB Flash Memory
T89C51AC2 ATMEL-T89C51AC2 Datasheet
1Mb / 117P
   Enhanced 8-bit Microcontroller with 32 KB Flash Memory
AT89C51AC2 ATMEL-AT89C51AC2_08 Datasheet
1Mb / 121P
   Enhanced 8-bit Microcontroller with 32 KB Flash Memory
T89C51CC02_0305 ATMEL-T89C51CC02_0305 Datasheet
1,003Kb / 145P
   Enhanced 8-bit Microcontroller with CAN Controller and Flash Memory
AT89C51CC01 ATMEL-AT89C51CC01 Datasheet
1Mb / 170P
   Enhanced 8-bit Microcontroller with CAN Controller and Flash Memory
T89C51CC01 ATMEL-T89C51CC01_03 Datasheet
1Mb / 160P
   Enhanced 8-bit Microcontroller with CAN Controller and Flash Memory
T89C51CC01 ATMEL-T89C51CC01_08 Datasheet
1Mb / 167P
   Enhanced 8-bit Microcontroller with CAN Controller and Flash Memory
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 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100  ...More


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
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