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LCD Benchmark


TK.

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Ever wanted to know the performance of your LCD?

-> please find a benchmark in the MIOS Download section.

From the header:

;
; LCD Performance Measuring Application
;
; This is some kind of benchmark which helps to evaluate the performance
; of various character and graphical displays, as well as the execution
; speed of a custom LCD driver
;
; 16 characters are print 4 times (-> 64 characters), the execution time 
; is measured with timer3, prescaler 1:8 - this means, that the counter 
; result has to be multiplied by 8 and 100 nS (@40 MHz) to get the
; absolute delay
;
; The result will be print on LCD, but also sent via MIDI
; (F0 <hex-digit 1> <hex-digit 2> <hex-digit3> <hex-digit4> F7, MSB first)
;
; And here the results:
;
; Displaytech LCDs from Reichelt:
;    o 2x16 KS0070B (HD44780 compatible):        3252 * 8 * 100 nS = 2.60 mS
;    o 2x20 KS0076B/KS0063 (HD44780 compatible): 3177 * 8 * 100 nS = 2.54 mS
;    o 2x40 KS0076B/KS0063 (HD44780 compatible): 3056 * 8 * 100 nS = 2.44 mS
;    o KS0107/0108 based 240x64 GLCD (sold out): 6124 * 8 * 100 nS = 4.90 mS
;
; For reference: 2x40 with 4-bit interface, nearly no difference!
;    o 2x40 KS0076B/KS0063 (HD44780 compatible): 3108 * 8 * 100 nS = 2.48 mS
;
; Various displays:
;    o Matrix Orbital via IIC:           4612 * 8 * 100 nS =  3.69 mS
;    o T6963C in vertical mode:              10647 * 8 * 100 nS =  8.51 mS
;    o T6963C in horizontal mode:       37420 * 8 * 100 nS = 29.93 mS (!!!)

Have fun - and publish your results here! :-)

Best Regards, Thorsten.

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OK, My LCD's are from http://www.lcds.shopeio.com/inventory/category.asp?cat=Lcds

Test results are:

Seiko L4042B1L 2x40 on my MBSEQv2:

Results: 4007 *8 *100 nS

Seiko L1642B1L 2x16 for testing the core:

Results: 4066 *8 *100 nS

cheers!!

EDIT: These LCD's needs negative voltage for good contrast results. I used MAX1044 chip to supply -2v.

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Mouser Part #:  763-NHD-0216PZ-FLYBW

Manufacturer Part #: NHD-0216PZ-FL-YBW

Manufacturer: Newhaven Display

Description: LCD Character Displays 2 x 16 STN-Y/G 80.0 x 36.0

2.4504ms

i know it's an old topic but i was playing around...

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