Hi,
I am planning a project that will utilize the Texas Instruments LED Display Driver "TLC5940," which requires serial data packets that are 192-bits in size to define the brightness values of its 16 channels.
I am going to be driving a rather massive Common Annode LED matrix with dimensions in the ballpark of 96 x 48, possibly even more. I plan on drawing the output image in one pass from top to bottom using the scanline method. Each scanline would be drawn in one shot.
This requires fast, serial-out memory, so I want to use the eye-popping M25PE80 Serial Flash Memory from ST to handle all of the brightness value data.
In order to use the least number of chips, I want to place TLC5940s along the smaller dimension of the display, which in this case will be the horizontal axis.
I want to display animation with a framerate of 30 frames per second and a refresh rate of 60Hz. This means I have to completely draw each frame one scanline at a time twice within 1/30th of a second.
The maximum speed of the switching on the TLC5940 is 30MHz, which is compatible with (but less than) the max speed of the M25PE80, but I'm worried this won't be enough to display what I've indicated above.
I'm stymied as to what precise speed is required in order to accomplish this goal. Once I figure that out I can move on from there.
Anybody?
I am planning a project that will utilize the Texas Instruments LED Display Driver "TLC5940," which requires serial data packets that are 192-bits in size to define the brightness values of its 16 channels.
I am going to be driving a rather massive Common Annode LED matrix with dimensions in the ballpark of 96 x 48, possibly even more. I plan on drawing the output image in one pass from top to bottom using the scanline method. Each scanline would be drawn in one shot.
This requires fast, serial-out memory, so I want to use the eye-popping M25PE80 Serial Flash Memory from ST to handle all of the brightness value data.
In order to use the least number of chips, I want to place TLC5940s along the smaller dimension of the display, which in this case will be the horizontal axis.
I want to display animation with a framerate of 30 frames per second and a refresh rate of 60Hz. This means I have to completely draw each frame one scanline at a time twice within 1/30th of a second.
The maximum speed of the switching on the TLC5940 is 30MHz, which is compatible with (but less than) the max speed of the M25PE80, but I'm worried this won't be enough to display what I've indicated above.
I'm stymied as to what precise speed is required in order to accomplish this goal. Once I figure that out I can move on from there.
Anybody?
