QT60248-ASG Atmel, QT60248-ASG Datasheet - Page 17

• Manufacturer Part Number: QT60248-ASG
• Description: IC SENSOR QMATRIX 24CHAN 32TQFP
• Manufacturer: Atmel
• Series: QMatrix™, QProx™r
• Type: Capacitiver

Specifications of QT60248-ASG

• Number Of Inputs/keys: 24 Key
• Resolution (bits): 9, 11 b
• Data Interface: Serial, SPI™
• Voltage - Supply: 3 V ~ 5 V
• Current - Supply: 25mA
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFP, 32-VQFP
• Output Type: Logic
• Interface: SPI
• Input Type: Logic
• Operating Supply Voltage: 3 V to 5 V
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• For Use With: 427-1087 - BOARD EVAL QT60248-AS QMATRIX
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 427-1108

lQ
0x0D
0xCk
0x0E
0x0F
0x4k
0x8k
Hex
Dump Setups
Eeprom CRC
Return last
cmmd
Data for 1 key
Status for key ‘k’
CAL key ‘k’
Name
Returns Setups block area followed by CRC.
Scanning is halted and then auto-restarted
after the cmd has completed.
Get eeprom CRC
Returns last command received
Get signal, ref, Norm DI for key k {0..23}
Signal: 2 bytes; Ref: 2 bytes; Norm DI: 1
byte
Get status byte for key ‘k’ {0..23}
Force calibration of key # k where k= 0..23.
Command must be repeated 2x consecutively
without any intervening command in 100ms to
execute
Description
#/Cmd
1
1
1
1
1
2
# Rtnd
100
1
1
5
2
1
Rtn range
Each byte
Each byte
17
0..0xFF
0..0xFF
0..0xFF
0..0xFF
0..0xFF
~0xCk
CRC
Yes
Yes
Yes
-
-
-
100 block data bytes + 1 CRC byte returned.
CRC-8 only on Setups array section of eeprom
This CRC is the same as the CRC at the end of Setups block load.
Returns 1’s compliment of last command even if bad. Resets the
communications error flag.
Diagnostic use only, not to be relied upon (no CRC). Signal and
ref are Tx as 2 bytes, LSB first.
Bits 7..5: reserved
Bit 4: 1= key is enabled
Bit 3: 1= key is in detect
Bit 2: 1= (Ref < LSL), even on a disabled key
Bit 1: 1= key is in calibration
Bit 0: 1= calibration of this key failed 5 times
Second return byte is CRC of cmmd + return data
Used in Run mode. Normal sensing of other keys not affected.
Returns the ones compliment of the cmd char, once the cal is
CAL of ‘k’ only takes place in the key’s normal timeslot.
scheduled.
Notes
QT60248-AS R4.02/0405
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