qt1100a Quantum Research Group, qt1100a Datasheet - Page 22

• Manufacturer Part Number: qt1100a
• Description: 10 Key Qtouch? Sensor Ic
• Manufacturer: Quantum Research Group

Figure 3-1 Suggested Serial Flow
LQ
Note: CRC errors or incorrect
responses should cause
affected transmissions to
retry
Internal Host
Comms with
Process
QT
Power On or
Clear 'Reset'
~10ms Delay
0xC2, 0xC7
Reset
flag
Keys OK
Only 1 Key
No eeprom
eeprom
present
in Detect
no error
No key,
Done
Key Detection Processing
CRC OK
Report all keys
Report 1st Key
0xC9 or 0xC0
Eeprom CRC
Cal Key 'k'
Check
0xC3
0xC1
0x1k
m m m m 2 Keys
Stuck Key
Detected
Detected
22
Any Error Flag
comms CRC error, or
(highest
multiple or repeating
precedence)
Extreme signal, or
CRC mismatch
cal error, or
CAL All
Calibration
0x03
Copyright © 2003-2005 QRG Ltd
General Status
errors
Errors for All
Error Handling
Error
0xC2
0xC5
Keys
Get
Get
QT1100A-ISG R3.01/0505
RAM or Eeprom
CRC error
comms CRC
non-critical
error (e.g.
Load Setups
error)
Block
0x01