E6248 Atmel, E6248 Datasheet - Page 21

• Manufacturer Part Number: E6248
• Description: BOARD EVAL QT60248-AS QMATRIX
• Manufacturer: Atmel
• Series: Quantum, QMatrix™r

Specifications of E6248

• Sensor Type: Touch, Capacitive
• Sensing Range: 16 / 24 Buttons/Keys
• Interface: SPI Serial
• Voltage - Supply: 3 V ~ 5 V
• Embedded: No
• Utilized Ic / Part: QT60168, QT60248
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Sensitivity: -
• Other names: 427-1087

Shorter spacings result in a faster response time to touch;
longer spacings permit higher burst lengths and longer
conversion times but slow down response time.
BS Default value:
BS Possible range:
5.12 Lower Signal Limit - LSL
This Setup determines the lowest acceptable value of signal
level for all keys. If any key’s reference level falls below this
value, the device declares an error condition in the status
bits.
Testing is required to ensure that there are adequate
margins in this determination. Key size, shape, panel
lQ
1 (500µs)
1..11 (500µs .. 3ms)
21
material, and burst length all factor into the detected signal
levels.
This parameter occupies 2 bytes of the setups table. The low
order byte should be sent first.
LSL Default value:
LSL Possible range:
5.13 Host CRC - HCRC
The setups block terminates with a 8-bit CRC, HCRC, of the
entire block. The formulae for calculating this CRC is shown
in Section 7.
100
0..2047
QT60248-AS R4.02/0405