at42qt1481 ATMEL Corporation, at42qt1481 Datasheet - Page 70

• Manufacturer Part Number: at42qt1481
• Description: 48-key Qmatrix Ic
• Manufacturer: ATMEL Corporation

70
AT42QT1481
4
5
Control Commands ................................................................................ 26
Setups ..................................................................................................... 39
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
4.13
4.14
4.15
4.16
4.17
4.18
4.19
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
5.13
5.14
5.15
5.16
5.17
Introduction ......................................................................................................26
Null Command – 0x00 .....................................................................................26
Enter Setups Mode – 0x01 ..............................................................................27
Low Level Cal and Offset – 0x02 .....................................................................27
Cal All – 0x03 ..................................................................................................28
Force Reset – 0x04 .........................................................................................28
QT1481 Overview – 0x06 ................................................................................28
Report Detections for All Keys – 0x07 .............................................................31
Report Error Flags for All Keys – 0x0B ............................................................31
Dump Setups Block – 0x0D .............................................................................31
EEPROM CRC – 0x0E ....................................................................................32
Return Last Command – 0x0F ........................................................................32
Internal Code – 0x10 .......................................................................................32
Internal Code – 0x13 .......................................................................................32
Sleep – 0x16 ....................................................................................................32
Data Set for One Key – 0x4k ...........................................................................32
Status for Key “k” – 0x8k .................................................................................33
Cal Key “k” – 0xck ...........................................................................................33
Command Sequencing ....................................................................................33
Negative Threshold – NTHR ...........................................................................39
Threshold Multiplier – THRM ...........................................................................40
Positive Threshold – PTHR .............................................................................40
Drift Compensation – NDRIFT, PDRIFT ..........................................................40
Detect Integrators – NDIL, FDIL ......................................................................42
Detect Integrator Multiplier – DIM ....................................................................43
Negative Recal Delay – NRD ..........................................................................43
Positive Recalibration Delay – PRD ................................................................43
Burst Length – BL ............................................................................................44
Adjacent Key Suppression Technology – AKS ................................................44
Oscilloscope Sync – SSYNC ...........................................................................45
Negative Hysteresis – NHYST ........................................................................46
Dwell Time – DWELL ......................................................................................46
Mains Sync – MSYNC .....................................................................................46
Restart Interrupted Burst – RIB .......................................................................47
Sleep Drift Compensation – SDC ....................................................................47
Serial Rate – SR ..............................................................................................48
9621B–AT42–06/11