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参数资料
| 型号： | AT42QT1111-AU |
| 厂商： | ATMEL CORP |
| 元件分类： | 速度传感器和接近开关 |
| 英文描述： | PROXIMITY SENSOR-CAPACITIVE, 0-5V, SQUARE, SURFACE MOUNT |
| 封装： | 7 X 7 MM, 1 MM HEIGHT, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MS-026ABA, TQFP-32 |
| 文件页数： | 7/50页 |
| 文件大小： | 637K |
| 代理商： | AT42QT1111-AU |
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15
9571B–AT42–08/10
AT42QT1111-MU/AT42QT1111-AU
4.1.5.2
Get Instructions
Get instructions are instructions that read the data from a location in the QT1111 memory map.
Figure 4-7.
Positive Recalibration Delay Get Instruction – CRC Disabled
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 shows the exchange for a report on the positive recalibration delay
(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).
Figure 4-8.
Positive Recalibration Delay Get Instruction – CRC Enabled
Host (Sends on MOSI)
Command: 0xD5
Null: 0x00
“Get” Data: 0x0C (Positive Recalibration Delay)
Simultaneous
Transmission
Response: 0x55 ( Idle”
Fresh Command)
“
–
Device (Responds on MISO)
Host (Sends on MOSI)
Command: 0xD5
Null: 0x00
“Get” CRC: 0xA3
Simultaneous
Transmission
Command CRC: 0x68
Response: 0x68 (Expected Command CRC)
“Get” Data: 0x0C (Positive Recalibration Delay)
Response: 0x55 ( Idle”
Fresh Command)
“
–
Device (Responds on MISO)
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