QT60486-AS Atmel, QT60486-AS Datasheet - Page 11

• 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

lQ
Advanced information; subject to change
5.1 Summary table of commands
0x00
0x01
0x03
0x04
0x05
0x06
0x07
0x08
0x09
Hex
Null command
Enter Setups mode
CAL all
Force reset
Error status
Report 1st key
Report all keys
Signals for all
References for all
Name
Used to get data back in SPI mode
Enter Setups, stop sensing; followed by block load of
binary Setups of length ‘nn’. Command must be repeated
2x consecutively without any intervening command in
100ms to execute. Sensing auto-restarts.
Force device to recalibrate all keys; re-enters RUN mode
afterwards automatically; Command must be repeated 2x
consecutively without any intervening command in 100ms
to execute
Force device to reset. Command must be repeated 2x
consecutively without any intervening command in 100ms
to execute
Get general part status
Bit 5 - set if FMEA failure
Bit 6 - set if comms error. This bit can be reset by
sending cmd 0x0F(last cmd).
Get indication of first touched key + others
Sends back all key detect status bits (bitfield)
Sends back all key signal levels
Sends back all key reference levels
Description
#/Cmd
2 + nn
+ 2
1
2
2
1
1
1
1
1
11
1+nn+
# rtnd
1+1
96
96
1
1
2
2
2
7
+ 0x00 (err)
Rtn range
0..0xFFFF
0..0xFFFF
48 words
48 words
0..0xFF
0..0xFF
0..0xFF
0..0xFF
6 bytes
+ 0xFE
0xFE
0xFC
0xFB
or
CRC
16
8
8
8
-
-
-
-
-
Flushes pending data from QT; one required to extract each
First 0xFE issued when ready to get data, second 0xFE
If 2 commands not received in 100ms, times out and no
If CRC failure, returns 0x00 instead of 0xFE
Data block length is ‘nn’ + 2 (CRC-16). CRC is sent LSB
The internal EEPROM will be programmed regardless of
Returns 1’s complement of command to acknowledge cmd
If 2 commands not received in 100ms, times out and no
Returns 1’s complement of command to acknowledge
Last return byte is CRC-8 of cmmd + return data
Bit 7 indicates more than one touch, if set.
Bit 6 is set if any of the following conditions prevail:
Bits 5..0 indicate first key touched;
Bits 5..0 = 0x3F if no touch.
2nd return byte is CRC-8 of cmmd + return data
Last return byte is CRC-8 of cmmd + return data
Returns block data for all keys’ signals
Returns block data for all keys’ references
response byte.
issued when all loaded and burned; else timeout.
response is issued. Part will timeout if each byte not
received within 100ms of previous byte.
first. A CRC of 0x0000 is also acceptable in which case
CRC is not checked.
CRC health, but, if the CRC is bad, the EEPROM will
not be marked ‘valid config changes’ and thus on reset
the EEPROM will be restored from flash backup thus
overwriting the desired (but corrupt) new setups..
once the cal has been scheduled.
response is issued.
command prior to reset. If 2 commands not received in
100ms, times out and no response is issued.
calibrating, key(s) failed cal, sync fail, comms error,
FMEA failure, EEPROM corrupt.
Notes
QT60486-AS 0.07/1103