AT42QT1110-AZ View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT42QT1110-AZ

11-key QTouch® Touch Sensor IC

Atmel Corporation 

Figure 4-8. Positive Recalibration Delay Get Instruction – CRC Enabled

Host (Sends on MOSI)

Device (Responds on MISO)

Command: 0xD5

Response: 0x55 (“Idle” – Fresh Command)

Simultaneous

Transmission

Command CRC: 0x68

Response: 0x68 (Expected Command CRC)

Null: 0x00

“Get” Data: 0x0C (Positive Recalibration Delay)

Null: 0x00

“Get” CRC: 0xA3

4.1.6 Quick SPI Mode

4.1.6.1 Introduction

In Quick SPI Mode, the QT1110 sends a 7-byte key report at each exchange. No host commands are required over

SPI in this mode; the host clocks the data bytes out in sequence. Quick SPI mode is enabled by setting the SPI_EN

bit in the Comms Options setup byte (see Section 7.5 on page 31).

4.1.6.2 Quick SPI Report

The 7 report bytes are in the format given in Table 4-1.

Table 4-1. Device Status Report Format

Byte Description

0 Counter

1 Detect status, channels 0 – 3

2 Detect status, channels 4 – 7

3 Detect status, channels 8 – 10

4 Error status, channels 0 – 3

5 Error status, channels 4 – 7

6 Error status, channels 8 – 10

Bit 7 Bit 6

Channel 3

Channel 7

Reserved

Channel 3

Channel 7

Reserved

Bit 5 Bit 4 Bit 3 Bit 2

Counter – increments from 0 to 255

Channel 2

Channel 1

Channel 6

Channel 5

Channel 10

Channel 9

Channel 2

Channel 1

Channel 6

Channel 5

Channel 10

Channel 9

Bit 1 Bit 0

Channel 0

Channel 4

Channel 8

Channel 0

Channel 4

Channel 8

AT42QT1110-MZ / AT42QT1110-AZ [DATASHEET] 16

9570J–AT42–05/2013

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