B6TS-08NF Omron, B6TS-08NF Datasheet - Page 24

• 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.
7.1
Parameter setting (preparation)
1.Juding change (THRx)
2.Hysteresis (HYSx)
3.Teaching measurement count (TCAL)
4.On-judgment ratio (RTHRx)
5.Hysteresis ratio (RHYSx)
Teaching
input around twice value of actual variation (difference between non-touch and touch)
Such parameters as the quantity of judging change can be set automatically through actual touches on the electrode.
This operation is called "Teaching".
When teaching, the reference value (REFx), quantity of judging change (THRx) and hysteresis (HYSx) are updated
appropriately, and stored in the EEPROM built into the chip.
Before performing a teaching operation, some preparation is required.
The processing flow is as follows 7.2.
During teaching, serial communication is not available.
However, checking the CHG pin allows status to be checked.
Once teaching mode is entered, any input other than /RESET is invalid until the measurement finishes and the chip
comes out of teaching mode. Be aware that serial communication cannot be performed concurrently.
Outline of teaching
Touch measurement (Max: TCAL × 32 times)
Measurement 8 times→REFx compensation
Calculate REFx and HYSx and store in EEPROM
CHG pin to HIGH
CHG pin to HIGH
Initate teaching
CHG pin to LOW
CHG pin to LOW
Teaching ends
Figure 9. teaching flow
24
MEAS pin = HIGH, /SETUP pin = LOW
State of CHG pin (indicating teaching status)
LOW
During this period touch each electrode
at least 3 times
HIGH