at42qt1481 ATMEL Corporation, at42qt1481 Datasheet - Page 38

• Manufacturer Part Number: at42qt1481
• Description: 48-key Qmatrix Ic
• Manufacturer: ATMEL Corporation

Table 4-5.
Hex
0x4k
0x8k
0xck
Name
Status for key ‘k’
Data for 1 key
CAL key ‘k’
Command Summary (Continued)
Description
Get signal, ref, Norm DI for key k {0 –
Signal: 2 bytes; Ref: 2 bytes; Norm
DI: 1 byte
Get status byte for key 'k' {0 – 47}
Force calibration of key # k where k =
0 – 47. Command must be repeated
twice consecutively without any
intervening command in 110 ms to
execute
47}
#/Cmd
1
1
2
# Rtnd
7
3
1
Rtn Range
Each byte
0 – 0xFF
0 – FF
0xck
CRC
16
16
–
Description
Signal and ref are Tx as 2 bytes, LSByte first.
16-bit CRC (of command + return data) is
appended to return
Bits 7 – 5: reserved
Bit 4: 1 = FMEA KGTT test failed on this key
Bit 3: 1 = key is in detect
Bit 2: 1 = (Ref < LSL)
Bit 1: 1 = key is in calibration
Bit 0: 1 = calibration of this key failed
16-bit CRC (of command + return data) is
appended to return
Used in Run mode. Normal sensing of other keys
not affected. CAL of ‘k’ only takes place in the
key’s normal timeslot.
Returns the ones complement of the command
char, once the calibration is scheduled.
Page
32
33
33