![](http://datasheet.mmic.net.cn/Atmel/QT60248C-ASG_datasheet_106627/QT60248C-ASG_2.png)
13
4.8 Report Error Flags for All Keys - 0x0b
..............
13
Table 4.1 Bits for key reporting and numbering
............
13
4.7 Report Detections for All Keys - 0x07
..............
13
4.6 Report 1st Key - 0x06
......................
12
4.5 General Status - 0x05
......................
12
4.4 Force Reset - 0x04
.......................
12
4.3 Cal All - 0x03
..........................
12
4.2 Enter Setups Mode - 0x01
....................
11
4.1 Null Command - 0x00
......................
11
4 Control Commands
.......................
11
3.3 Command Error Handling
....................
10
3.2 SPI Communications
......................
10
3.1 DRDY Pin
............................
10
3 Serial Communications
.....................
9
Figure 2.7 Wiring Diagram
......................
8
Table 2.2 - Pin Listing
.......................
8
2.17 Wiring
.............................
7
2.16 FMEA Tests
..........................
7
2.15 Detection Integrators
......................
7
2.14 Spread Spectrum Acquisitions
.................
6
2.13 Reset Input
..........................
6
Table 2-1 Basic Timings
......................
6
2.12 Startup / Calibration Times
...................
6
2.11 Power Supply Considerations
.................
6
2.10.2 PCB Cleanliness
.......................
6
2.10.1 LED Traces and Other Switching Signals
............
6
2.10 PCB Layout, Construction
...................
5
2.9 Key Design
...........................
5
2.8 Matrix Series Resistors
.....................
4
2.7 Signal Levels
..........................
4
2.6 Sample Resistors
........................
4
2.5 Sample Capacitors; Saturation
.................
4
2.4 Oscillator
............................
3
2.3 Response Time
.........................
3
2.2 Disabling Keys; Burst Paring
...................
3
2.1 Matrix Scan Sequence
......................
3
2 Hardware & Functional
.....................
3
1.2 Enabling / Disabling Keys
....................
3
1.1 Part differences
.........................
3
1 Overview
..............................
27
7.3 PCB Layout
...........................
27
7.2 1-Sided Key Layout
.......................
26
7.1 8-Bit CRC Algorithm
.......................
26
7 Appendix
.............................
25
6.6 Marking
.............................
24
6.5 Mechanical Dimensions
.....................
24
6.4 Timing Specifications
......................
24
6.3 DC Specifications
........................
24
6.2 Recommended operating conditions
...............
24
6.1 Absolute Maximum Electrical Specifications
...........
24
6 Specifications
..........................
23
Table 5.3 Setups Block Summary
..................
22
Table 5.2 Key Mapping
.......................
22
Table 5.1 Setups Block
.......................
21
5.13 Host CRC - HCRC
.......................
21
5.12 Lower Signal Limit - LSL
....................
20
5.11 Burst Spacing - BS
.......................
20
5.10 Mains Sync - MSYNC
.....................
20
5.9 Oscilloscope Sync - SSYNC
...................
20
5.8 Adjacent Key Suppression - AKS
................
20
5.7 Burst Length - BL
........................
19
5.6 Positive Recalibration Delay - PRD
...............
19
5.5 Negative Recal Delay - NRD
...................
19
5.4 Detect Integrators - NDIL, FDIL
.................
18
5.3 Drift Compensation - NDRIFT, PDRIFT
.............
18
5.2 Positive Threshold - PTHR
...................
18
5.1 Negative Threshold - NTHR
...................
18
5 Setups
...............................
16
Table 4.2 Command Summary
....................
14
4.18 Command Sequencing
.....................
14
4.17 Cal Key ‘k’ - 0xck
........................
14
4.16 Status for Key ‘k’ - 0x8k
....................
14
4.15 Data Set for One Key - 0x4k
..................
13
4.14 Internal Code - 0x12
......................
13
4.13 Internal Code - 0x10
......................
13
4.12 Return Last Command - 0x0f
..................
13
4.11 Eeprom CRC - 0x0e
......................
13
4.10 Dump Setups Block - 0x0d
...................
13
4.9 Report FMEA Status - 0x0c
...................
lQ
2
QT60248-AS R4.02/0405
Contents