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AT42QT2100 Datasheet(PDF) 22 Page - ATMEL Corporation |
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AT42QT2100 Datasheet(HTML) 22 Page - ATMEL Corporation |
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22 / 44 page  22 AT42QT2100 [DATASHEET] 9554E–AT42–01/13 Byte 2 Cal Key Num – key to be recalibrated when CalK = 1 (see Table 5-5). CalK – Recalibrates the key(s) specified by Cal Key Num. CalK = 0: No recalibration (normal state of this bit). CalK = 1: The device recalibrates key(s). CalW – Recalibrates the slider/wheel. CalW = 0: No recalibration (normal state of this bit). CalW = 1: The device recalibrates the slider/wheel. Set CalK/CalW only once when required, and set CalK/CalW = 0 thereafter. If the bit is constantly set to 1, the device will keep recalibrating and will never detect a touch. Note that the device recalibrates automatically on power-up, so that the use of Recal should rarely be required. Any channel used as a proximity detector should be recalibrated soon after each proximity detection, to ensure stability. Resolution – the resolution of the slider/wheel reported position (see Table 5-6 and Figure 5-1). Note: A resolution change will only become effective on the next touch. Table 5-5. Key Recalibration Cal Key Num Bits Key 000 Recalibrate all keys (excluding slider/wheel) 001 Recalibrate Key 1 010 Recalibrate Key 2 011 Recalibrate Key 3 100 Recalibrate Key 4 101 Recalibrate Key 5 110 Recalibrate Key 6 111 Recalibrate Key 7 Table 5-6. Resolution Resolution Bits Resolution 000 Reserved 001 2 Bits: 4 positions (0 – 3) 010 3 Bits: 8 positions (0 – 7) 011 4 Bits: 16 positions (0 – 15) 100 5 Bits: 32 positions (0 – 31) 101 6 Bits: 64 positions (0 – 63) 110 7 Bits: 128 positions (0 – 127) (default) 111 8 Bits: 256 positions (0 – 255) |
Similar Part No. - AT42QT2100_14 |
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Similar Description - AT42QT2100_14 |
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