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PCA2117DUGS/DA Datasheet(PDF) 19 Page - NXP Semiconductors |
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PCA2117DUGS/DA Datasheet(HTML) 19 Page - NXP Semiconductors |
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19 / 107 page  PCA2117 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 4 — 8 April 2015 19 of 107 NXP Semiconductors PCA2117 Automotive LCD driver for character displays Frame inversion mode (driving scheme B): In frame inversion mode, the DC value is compensated across two frames and not within one frame. Changing the inversion mode to frame inversion reduces the power consumption, therefore it is useful when power consumption is a key point in the application. Frame inversion may not be suitable for all applications. The RMS voltage across a segment is better defined, however since the switching frequency is reduced there is the possibility for flicker to occur. 8.1.2.6 Command: Frame_frequency With this command, the clock and frame frequency can be programmed when using the internal clock. The default frame frequency of 80 Hz is factory calibrated. The duty cycle depends on the frequency chosen (see Table 24). Table 23. Frame-frequency - frame frequency select command bit description Bit Symbol Value Description -R/W 0 fixed value - RS[1:0] 10 fixed value 7 to 5 - 100 fixed value 4 to 0 FF[4:0] see Table 24 frame frequency setting Table 24. Clock and frame frequency values Duty cycle definition: % HIGH-level time : % LOW-level time. FF[4:0] Frame frequency (Hz) Clock frequency (Hz) Typical duty cycle (%) 00000 45 36000 50 : 50 00001 50 39724 44 : 56 00010 55 44308 38 : 62 00011 60 48000 33 : 67 00100 65 52364 27 : 73 00101 70 54857 23 : 77 00110 75 60632 15 : 85 00111[1] 80 64000 11 : 89 01000 85 67765 5 : 95 01001 90 72000 50 : 50 01010 95 76800 46 : 54 01011 100 82286 42 : 58 01100 110 88615 38 : 62 01101 120 96000 33 : 67 01110 130 104727 27 : 73 01111 145 115200 20 : 80 10000 160 128000 11 : 89 10001 180 144000 50 : 50 10010 210 164571 42 : 58 |
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