B6TS-08NF Omron, B6TS-08NF Datasheet - Page 26

• Manufacturer Part Number: B6TS-08NF
• Description: Capacitance Touch Sensors Sensing IC
• Manufacturer: Omron
• Series: -r
• Type: Capacitiver

Specifications of B6TS-08NF

• Supply Voltage: - 0.3 V to 6.5 V
• Number Of Channels: 8
• Dimensions: 9 mm L x 9 mm W x 1.7 mm H
• Output Voltage: -0.3 V to Vsupply + 0.3 V
• Power Dissipation: 300 mW
• Temperature Range: - 20 C to + 85 C
• Termination Style: SMD/SMT
• Sensitivity: -
• Response Time: -
• Interface: SPI
• Channel Inputs: 8 Key
• Voltage - Supply: 4.5 V ~ 5.5 V
• Actuator Type: -
• Package / Case: 32-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.4
7.3
There are two ways to enter teaching mode:
When entering teaching mode by method (1), set the /SETUP pin to high or the MEAS pin to low before teaching
finishes. If /SETUP pin = high and the MEAS pin = low, teaching will commence again.
When entering teaching mode, the CHG pin changes to high, indicating entry to teaching mode.
Just after teaching has started, the chip calibrates the reference value (REFx) (the measured value with no-touch).
The measurement is performed eight times for each electrode, and the average of the eight measured values is
taken as REFx. After the calibration finishes, the CHG pin output changes to low. Do not touch the touch electrode
until the CHG pin changes to low.
After REFx has been calibrated, the chip starts the teaching measurement count ((TCAL)×32 times).
During this period, touch each electrode three times or more. The order for touching each of the electrodes is not
defined. After the specified number of teaching measurements have finished, the CHG pin changes to high.
However, if the number of touches (the number of times the chip recognizes a touch) reaches 32, the chip finishes
measuring and changes the CHG pin to high, even if the teaching measurement count has not been reached.
When touching the electrodes, do not touch two or more electrodes at the same time. If you do, teaching cannot be
performed correctly. If more than one electrode is touched simultaneously in error, touch each of the electrodes
touched simultaneously again. Touch all of the electrodes three times or more within the teaching measurement time.
After the touch measurements have finished, the chip updates the quantity of judging change (THRx), and hysteresis
(HYSx) according to the calculation formula described in "7.2.4 On-judgment ratio and hysteresis ratio" (updates the
values stored in the built-in ROM). After the values are updated, the CHG pin changes to low and teaching finishes.
When teaching finishes correctly, bit14 (TER bit) of the data, which can be read with the MODE command, changes
to "1". If teaching is not completed normally because the specified number of touches are not executed within the
teaching measurement time or for some other reason, the TER bit changes to "0" and the quantity of judging change
(THRx) and hysteresis (HYSx) are not updated. (In this event, only the reference value (REFx) is updated.)
To reset the TER bit, set it to "1" using the MODE command, or perform teaching again (and finish the teaching
operation normally).
Checking the result of teaching
Performing teaching
(1)
(2)
/SETUP pin = low, and MEAS pin = high
Write "0" into bit15 (TS) using the MODE command in setup mode.
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3713050-2A Ver.080123