QT60486-AS Atmel, QT60486-AS Datasheet - Page 9

• Manufacturer Part Number: QT60486-AS
• Description: SENSOR IC MTRX TOUCH48KEY 44TQFP
• Manufacturer: Atmel
• Series: QMatrix™, QProx™r
• Type: Capacitiver

Specifications of QT60486-AS

• Rohs Status: RoHS non-compliant
• Number Of Inputs/keys: 48 Key
• Resolution (bits): 9, 11 b
• Data Interface: Serial, SPI™, UART
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 25mA
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 44-TQFP, 44-VQFP
• Output Type: *
• Interface: *
• Input Type: *
• For Use With: 427-1088 - BOARD EVAL QT60486-AS QMATRIX

4.7 Report Detections for All Keys - 0x07
Returns six bytes which indicate all keys in detection if any,
as a bitfield. The first byte returned is the MSByte. Key 0
reports in LSByte bit 0.
A CRC byte is appended to the response; this CRC folds in
the command 0x07 itself initially.
4.8 Report Signals for All Keys - 0x08
Returns the raw signal values for all keys. Each value is a
16-bit number, and there are 48 words returned. No CRC is
appended to the return, so the data should not be considered
secure. The high byte of key 0 is returned first.
4.9 Report References for All Keys - 0x09
Returns the reference values for all keys. Each value is a
16-bit number, and there are 48 words returned. No CRC is
appended to the return, so the data should not be considered
secure. The high byte of key 0 is returned first.
4.10 Report Deltas for All Keys - 0x0a
Returns the delta signal values with respect to the reference
levels for all keys. Each value is an 8-bit signed number, and
there are 48 bytes returned. No CRC is appended to the
return, so the data should not be considered secure. The
byte for key 0 is returned first.
If the delta value exceeds the range -127 ... +128, the result is
truncated.
4.11 Report Error Flags for All Keys - 0x0b
Returns six bytes which show error flags as a bitfield for all
keys. The first byte returned is the MSByte. Key 0 reports in
LSByte bit 0.
A CRC byte is appended to the response; this CRC folds in
the command 0x0b itself initially.
4.12 Report FMEA Status - 0x0c
Returns one byte which shows the FMEA error status of the X
and Y matrix scan lines, OR’d together in one result byte.
Each bit in the byte represents the OR of one X and one Y
scan line (except for the top two bits which are X only). A one
in any bit position indicates an error in a corresponding scan
line.
A CRC byte is appended to the response; this CRC folds in
the command 0x0c itself initially.
4.13 Dump Setups Block - 0x0d
This command causes the device to dump the entire internal
Setups block back to the host.
If the transfer is not paced faster than 100ms per byte the
transfer will be aborted and the device will time out. This can
happen if the host is also controlling DRDY.
During the transfer, sensing is halted. Sensing is resumed
after the command has finished.
A 16-bit CRC is appended to the response; this CRC is the
same as the Setups table CRC and is sent LSByte first.
4.14 Eeprom CRC - 0x0e
This command returns the 16-bit CRC calculated from the
eeprom contents. The CRC is sent back LSByte first. The
CRC sent back is the same CRC that is appended to the end
of the Setups block.
lQ
Advanced information; subject to change
9
No CRC is appended to the response.
4.15 Return Last Command - 0x0f
This command returns the last received command character,
in 1’s complement (inverted). If the command is repeated
twice or more, it will return the inversion of 0x0f, 0xf0.
If a prior command was not valid or was corrupted, it will
return the bad command as well.
No CRC is appended to the response.
4.16 Version - 0x10
This command returns the version number of the part as a
value from 0..255.
A CRC byte is appended to the response; this CRC folds in
the command 0x10 itself initially.
4.17 Internal Code - 0x11
This command returns an internal code word (2 bytes) of the
part for factory diagnostic purposes.
A CRC byte is appended to the response; this CRC folds in
the command 0x11 itself initially.
4.18 Internal Code - 0x12
This command returns an internal code word (2 bytes) of the
part for factory diagnostic purposes.
No CRC is appended to the response.
4.19 Sleep - 0x16
The command must be repeated 2x within 100ms or the
command will fail. After the 2nd 0x16 from the host, the
device will reply with the character 0xe9 then sleep.
The device will then enter a lower power sleep mode until
awakened by an edge or pulse on pin WS. When the device
wakes, it will resume current operation in the state from which
it exited and attempt to send a 0x01 code back to the host.
During Sleep the DRDY pin is held low, and released once
the device awakes and is ready to return the 0x01 code.
The WS pin can be connected to Rx or /SS to provide a ‘free’
wakeup connection from the host controller. A dummy byte or
/SS toggle can be sent to wake up the device.
4.20 Data Set for One Key - 0x4k
Returns the data set for key k, where k = {0..47}. This returns
5 bytes, in the sequence:
Signal and Reference are returned LSByte first.
No CRC is appended.
4.21 Status for Key ‘k’ - 0x8k
Returns a bitfield for key ‘k’ where k is from {0..47}. The
bitfield indicates as follows:
A CRC byte is appended to the response; this CRC folds in
the command 0x8k itself initially.
Signal (2 bytes)
Reference (2 bytes)
Normal Detect Integrator (1 byte)
Bit 4: Set if key is enabled
Bit 3: Set if key is in detect
Bit 2: Set if the key’s reference is less than LSL
QT60486-AS 0.07/1103