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STM32L100RC Datasheet(PDF) 97 Page - STMicroelectronics |
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STM32L100RC Datasheet(HTML) 97 Page - STMicroelectronics |
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97 / 106 page  DocID024995 Rev 5 97/106 STM32L100RC 97 6.3.21 LCD controller The device embeds a built-in step-up converter to provide a constant LCD reference voltage independently from the VDD voltage. An external capacitor Cext must be connected to the VLCD pin to decouple this converter. 2. The delay is characterized for 100 mV input step with 10 mV overdrive on the inverting input, the non- inverting input set to the reference. 3. Comparator consumption only. Internal reference voltage (necessary for comparator operation) is not included. Table 61. LCD controller characteristics Symbol Parameter Min Typ Max Unit VLCD LCD external voltage - - 3.6 V VLCD0 LCD internal reference voltage 0 - 2.6 - VLCD1 LCD internal reference voltage 1 - 2.73 - VLCD2 LCD internal reference voltage 2 - 2.86 - VLCD3 LCD internal reference voltage 3 - 2.98 - VLCD4 LCD internal reference voltage 4 - 3.12 - VLCD5 LCD internal reference voltage 5 - 3.26 - VLCD6 LCD internal reference voltage 6 - 3.4 - VLCD7 LCD internal reference voltage 7 - 3.55 - Cext VLCD external capacitance 0.1 - 2 µF ILCD(1) 1. LCD enabled with 3 V internal step-up active, 1/8 duty, 1/4 bias, division ratio= 64, all pixels active, no LCD connected. Supply current at VDD = 2.2 V - 3.3 - µA Supply current at VDD = 3.0 V - 3.1 - RHtot(2) 2. Guaranteed by design. Low drive resistive network overall value 5.28 6.6 7.92 M Ω RL(2) High drive resistive network total value 192 240 288 k Ω V44 Segment/Common highest level voltage - - VLCD V V34 Segment/Common 3/4 level voltage - 3/4 VLCD - V V23 Segment/Common 2/3 level voltage - 2/3 VLCD - V12 Segment/Common 1/2 level voltage - 1/2 VLCD - V13 Segment/Common 1/3 level voltage - 1/3 VLCD - V14 Segment/Common 1/4 level voltage - 1/4 VLCD - V0 Segment/Common lowest level voltage 0 - - ΔVxx(3) 3. Guaranteed by characterization results. Segment/Common level voltage error TA = -40 to 105 ° C -- ± 50 mV |
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