Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

How to drive 7-segment display using I2C

Status
Not open for further replies.
M

muthuswaamy

Newbie level 2
Joined
Oct 19, 2010
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,294
hai
i'm facing a problem to drive 6-digit 7 segment Lcd display with PIC 16f877A, hence the port limitation is upto 33 i have palnned to switch to serial communication based driving method. I am not much familiar with this before.kindly help me.
 

The SAA1064 is a 32-bit LED controller with an I2C bus. The LED controller is a bipolar integrated circuit made in an I2L-compatible 18v process. This product is optimized to drive four 7-segment LED displays with decimal point by means of multiplexing between two pairs of digits.
It features an I2C-bus slave transceiver interface with the possibility to program four different SLAVE ADDRESSES, a POWER RESET flag, 16 current sink OUTPUTS (controllable by software up to 21mA), two multiplex drive outputs for common anode segments, an on-chip multiplex oscillator, control bits to select static/dynamic/blank modes, and one bit for segment test. Additionally, it can be used to control LEDs.

---------- Post added at 13:07 ---------- Previous post was at 13:06 ----------

http://ics.nxp.com/products/interface/datasheet/saa1064.pdf
 

thanks for the post nikhilele,but the thing i required is not for LED display. 7 segment LCD display is something different from LED displays.
 

Designed for 7segements only you have not gone throught datasheet


The LED-driver is a bipolar integrated circuit made in an
I2L compatible 18 volts process. The circuit is especially
designed to drive four 7-segment LED displays with
decimal point by means of multiplexing between two pairs
of digits. It features an I2C-Bus slave transceiver interface
with the possibility to program four different SLAVE
ADDRESSES, a POWER RESET flag, 16 current sink
OUTPUTS, controllable by software up to 21 mA, two
multiplex drive outputs for common anode segments, an
on-chip multiplex oscillator, control bits to select static,
dynamic and blank mode, and one bit for segment test.
 

Hi All.

try with two SAA1064 and interface with MPQ2222A

---------- Post added at 11:48 ---------- Previous post was at 11:47 ----------

Hi All.

try with two SAA1064 and interface with MPQ2222A
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top