AT42QT2120 Datasheet

29
9634E–AT42–06/12
AT42QT2120
5.19 Address 52 – 75: Key Signal
KEY SIGNAL: addresses 52 – 75 allow key signals to be read for each key, starting with key 0.
There are two bytes of data for each key. These are the key’s 16-bit key signals which are
accessed as two 8-bit bytes, stored MSByte first. These addresses are read-only.
5.20 Address 76 – 99: Reference Data
REFERENCE DATA: addresses 76 – 99 allow reference data to be read for each key, starting
with key 0. There are two bytes of data for each key. These are the key’s 16-bit reference data
which is accessed as two 8-bit bytes, stored MSByte first. These addresses are read-only.
Table 5-20. Key Signal
Address Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
52 MSByte OF KEY SIGNAL FOR KEY 0
53 LSByte OF KEY SIGNAL FOR KEY 0
::
74 MSByte OF KEY SIGNAL FOR KEY 11
75 LSByte OF KEY SIGNAL FOR KEY 11
Table 5-21. Reference Data
Address Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
76 MSByte OF REFERENCE DATA FOR KEY 0
77 LSByte OF REFERENCE DATA FOR KEY 0
::
98 MSByte OF REFERENCE DATA FOR KEY 11
99 LSByte OF REFERENCE DATA FOR KEY 11