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參數(shù)資料
| 型號： | AT42QT1111-AU |
| 廠商： | ATMEL CORP |
| 元件分類： | 速度傳感器和接近開關(guān) |
| 英文描述： | PROXIMITY SENSOR-CAPACITIVE, 0-5V, SQUARE, SURFACE MOUNT |
| 封裝： | 7 X 7 MM, 1 MM HEIGHT, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MS-026ABA, TQFP-32 |
| 文件頁數(shù)： | 18/50頁 |
| 文件大?。?/td> | 637K |
| 代理商： | AT42QT1111-AU |
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25
9571B–AT42–08/10
AT42QT1111-MU/AT42QT1111-AU
0 = only one key is in detect (specified by “KEY_NUM”)
1 = more than one key in detect.
ERROR: 0 = there are no keys in an error state; 1 = at least one key is in error state.
KEY_NUM: the key number (0 to 10) of the key in detect (if there is only one), or the number of
the first key to go into detection when there are more than one.
6.3
All Keys (0xC1)
Returns a 2-byte bit-field report indicating the detection status of all 11 keys.
KEY_n: 0 = key n out of detect, 1 = key n in detect (where n is 0–10).
6.4
Device Status (0xC2)
This command returns a 1-byte bit-field report indicating the overall status of the QT1111.
Bits 7 is always 1; the other bits are as follows:
DETECT: 0 = no key in detect, 1 = at least 1 key in detect.
CYCLE: 0 = cycle time is good, 1 = cycle time over-run. A cycle time over-run occurs when it
takes longer to measure and process all the keys than the assigned cycle time.
ERROR: 0 = no key in error state, 1 = at least 1 key in error.
CHANGE: 0 = CHANGE pin is asserted, 1 = CHANGE pin is floating.
EEPROM: 0 = EEPROM is good, 1 = EEPROM has an error. If there are no settings stored in
EEPROM, the EEPROM error bit is set and a zero EEPROM CRC is returned.
RESET: set to 1 after power-on or reset, cleared when “Device Status” is read.
GUARD: 0 = guard channel is not in detect, 1 = guard channel is active or in detect. This bit will
be zero if the guard channel is not enabled.
6.5
EEPROM CRC (0xC3)
This command returns a 1-byte CRC checksum for the setup data in EEPROM.
6.6
RAM CRC (0xC4)
This command returns a 1-byte CRC checksum for the setup data in RAM.
Table 6-3.
Send All Keys Report Format
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Byte 0
KEY_10
KEY_9
KEY_8
Byte 1
KEY_7
KEY_6
KEY_5
KEY_4
KEY_3
KEY_2
KEY_1
KEY_0
Table 6-4.
Device Status Report Format
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Byte 0
1
DETECT
CYCLE
ERROR
CHANGE
EEPROM
RESET
GUARD
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