Electronic Components Datasheet Search
Selected language     English  ▼
Part Name
         Description


HD44780 Datasheet(PDF) 33 Page - Hitachi Semiconductor

Part No. HD44780
Description  Dot Matrix Liquid Crystal Display Controller/Driver
Download  59 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  HITACHI [Hitachi Semiconductor]
Homepage  http://www.renesas.com/eng
Logo 

 33 page
background image
HD44780U
33
• Interfacing to a 4-bit MPU
The HD44780U can be connected to the I/O port of a 4-bit MPU. If the I/O port has enough bits, 8-bit
data can be transferred. Otherwise, one data transfer must be made in two operations for 4-bit data. In
this case, the timing sequence becomes somewhat complex. (See Figure 17.)
See Figure 18 for an interface example to the HMCS4019R.
Note that two cycles are needed for the busy flag check as well as for the data transfer. The 4-bit
operation is selected by the program.
RS
R/W
E
Internal
operation
DB7
IR7
IR3
Busy AC3
Not
busy AC3
D7
D3
Instruction
write
Busy flag
check
Busy flag
check
Instruction
write
Note: IR7 , IR3 are the 7th and 3rd bits of the instruction.
AC3 is the 3rd bit of the address counter.
Functioning
Figure 17 Example of 4-Bit Data Transfer Timing Sequence
D15
D14
D13
R10 to R13
RS
R/W
E
DB4 to DB7
COM1 to
COM16
SEG1 to
SEG40
4
40
16
LCD
HMCS4019R
HD44780
Figure 18 Example of Interface to HMCS4019R




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 


Datasheet Download



Related Electronics Part Number

Part NumberComponents DescriptionHtml ViewManufacturer
DM161316 characters x 1 line Liquid Crystal Dot Matrix Display Module 1 2 3 4 5 MoreSanyo Semicon Device
DM161B16 characters x 1 line Liquid Crystal Dot Matrix Display Module 1 2 3 4 5 MoreSanyo Semicon Device
HD66780Dot Matrix Liquid Crystal Display Controller and Driver 1 2 3 4 5 MoreHitachi Semiconductor
DM162016 characters x 2 line Liquid Crystal Dot Matrix Display Module 1 2 3 4 5 MoreSanyo Semicon Device
DM162116 characters x 2 line Liquid Crystal Dot Matrix Display Module 1 2 3 4 5 MoreSanyo Semicon Device
DS202320 CHARACTERS * 2 LINES LIQUID CRYSTAL DOT MATRIX DISPLAY MODULE 1 2 3 4 5 MoreSanyo Semicon Device
DM162216 characters x 2 line Liquid Crystal Dot Matrix Display Module 1 2 3 4 5 MoreSanyo Semicon Device
DM162316 characters x 2 line Liquid Crystal Dot Matrix Display Module 1 2 3 4 5 MoreSanyo Semicon Device
HD61203U Dot Matrix Liquid Crystal Graphic Display 64-Channel Common Driver 1 2 3 4 5 MoreHitachi Semiconductor
LMG-SSC12A64DOT MATRIX LIQUID CRYSTAL DISPLAY MODULE 1 2 3 4 5 MoreList of Unclassifed Manufacturers

Link URL

Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Bookmark   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com 2003 - 2017    


Mirror Sites
English : Alldatasheet.com  , 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