Electronic Components Datasheet Search
Selected language     English  ▼
Part Name
         Description


HD44780 Datasheet(PDF) 22 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 

 22 page
background image
HD44780U
22
Interfacing to the MPU
The HD44780U can send data in either two 4-bit operations or one 8-bit operation, thus allowing
interfacing with 4- or 8-bit MPUs.
• For 4-bit interface data, only four bus lines (DB4 to DB7) are used for transfer. Bus lines DB0 to DB3
are disabled. The data transfer between the HD44780U and the MPU is completed after the 4-bit data
has been transferred twice. As for the order of data transfer, the four high order bits (for 8-bit operation,
DB4 to DB7) are transferred before the four low order bits (for 8-bit operation, DB0 to DB3).
The busy flag must be checked (one instruction) after the 4-bit data has been transferred twice. Two
more 4-bit operations then transfer the busy flag and address counter data.
• For 8-bit interface data, all eight bus lines (DB0 to DB7) are used.
RS
R/W
E
IR7
IR6
IR5
IR4
BF
AC6
AC5
AC4
DB7
DB6
DB5
DB4
Instruction register (IR)
write
Busy flag (BF) and
address counter (AC)
read
Data register (DR)
read
IR3
IR2
IR1
IR0
AC3
AC2
AC1
AC0
DR7
DR6
DR5
DR4
DR3
DR2
DR1
DR0
Figure 9 4-Bit Transfer Example




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