E6248 Atmel, E6248 Datasheet - Page 15

• 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

lQ
Note: CRC errors or incorrect
responses should cause
each transmission to retry
Internal Host
Comms with
Processes
Power On or Hardware Reset
0xF0 not
returned
QT
'Last command'
~10ms Delay
0x0F
Get
Keys OK
Only 1 Key
returned
in Detect
Figure 4-1 Suggested Communications Flow
0xF0
no error
Done
No key,
Key Detection(s) Processing
CRC is OK
Report 1st Key
Setups CRC
detections
Cal Key 'k'
Report all
Check
0x0E
0x06
0x07
0xck
m m m m 2 Keys
Stuck Key
Detected
(optional)
Detected
Setups CRC
15
failed 1x
Setups CRC failed 2x
precedence)
Error Flag
(takes
calibration fail, or
multiple errors
FMEA Status
Load Setups
FMEA fail, or
Block
0x0C
0x01
Get
General Status
FMEA
Error
Error Handling
0x05
Get
Calibration
Comms
Error
Errors for All
Error
QT60248-AS R4.02/0405
0x0B
Keys
Get
'Last command'
(clear error)
Force Reset
0x0F
0x04
Get
resolvable
error