AT42QT1111MU ATMEL [ATMEL Corporation], AT42QT1111MU Datasheet - Page 15

• Manufacturer Part Number: AT42QT1111MU
• Manufacturer: ATMEL [ATMEL Corporation]

4.1.5.2
9571A–AT42–02/10
Get Instructions
Get instructions are instructions that read the data from a location in the QT1111 memory map.
Figure 4-7.
The host sends the appropriate “Get” command, followed by a “Null” byte. The QT1111 returns
the contents of the addressed memory location.
Figure 4-7 on page 15
(assuming that the data byte is 0x0C).
With CRC Enabled, this exchange takes 4 bytes, with a command CRC transmitted by the host
and a report CRC returned by the QT1111 (see
Figure 4-8.
Host (Sends on MOSI)
Host (Sends on MOSI)
Positive Recalibration Delay Get Instruction – CRC Disabled
Positive Recalibration Delay Get Instruction – CRC Enabled
“Get” Data: 0x0C (Positive Recalibration Delay)
“Get” Data: 0x0C (Positive Recalibration Delay)
shows the exchange for a report on the positive recalibration delay
Response: 0x68 (Expected Command CRC)
Response: 0x55 ( Idle”
Response: 0x55 ( Idle”
AT42QT1111-MU/AT42QT1111-AU
Command CRC: 0x68
“Get” CRC: 0xA3
Command: 0xD5
Command: 0xD5
Null: 0x00
Null: 0x00
Null: 0x00
“
“
–
–
Figure
Fresh Command)
Fresh Command)
4-8).
Device (Responds on MISO)
Device (Responds on MISO)
Simultaneous
Transmission
Simultaneous
Transmission
15