at42qt2100 ATMEL Corporation, at42qt2100 Datasheet - Page 29

• Manufacturer Part Number: at42qt2100
• Description: Qtouch Touch Sensor Ic
• Manufacturer: ATMEL Corporation

5.5
5.5.1
5.5.2
5.5.3
9554CX–AT42–11/11
“Device Version”
Introduction
Host Data
QT2100 Data
In a “Device Version” exchange (Req = 010) the host requests the QT2100 to send the device
ID and Firmware version information.
In “Device Version” command mode the host sends the 3-byte data in
Table 5-13.
Byte 0
Byte 1
Byte 2
During this exchange, the QT2100 returns the data requested on the previous exchange
(Normal Data by default), and at the next exchange the requested data is returned.
Table 5-14.
Byte 0
Byte 1
Byte 2
Note:
QT2100
Host
Byte
Byte
Req: Set to 010 to indicate “Device Version” command mode.
Always set to 0.
Always set to 0.
Device ID: the device ID; always 108 (0x6C)
Version Major: 4 bits, indicating the major version of the device.
Version Minor: 4 bits, indicating the minor version of the device.
For example, firmware version 1.0 would be indicated as 0x10.
Build: The build of this firmware version.
0
1
2
0
1
2
Bits labelled “0” should not be altered
“Device Version” Command Mode – Host Command Bytes
“Device Version” Command Mode – Return Bytes
7
0
0
7
Req = 010
Version Major
6
0
0
6
5
0
0
5
Device ID = 108 (0x6C)
4
0
0
0
4
Build
Bit
Bit
3
0
0
0
3
Version Minor
2
0
0
0
2
AT42QT2100
Table
5-13.
1
0
0
0
1
0
0
0
0
0
29