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5.14 Beep Tone and Length (FFh)
This register defines the beep tone (frequency) and beep length. It is only implemented on Nano
Module Multi ISO.
Beep Tone and Length Register
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Length
Tone
The beep tone code selects a predefined frequency from the table below:
Tone[3:0]
Frequency
Standard pitch (Vienna scale)
0000
523Hz
C
0001
554Hz
Cis
0010
587Hz
D
0011
622Hz
Dis
0100
659Hz
E
0101
699Hz
F
0110
739Hz
Fis
0111
784Hz
G
1000
831Hz
Gis
1001
880Hz
A
1010
932Hz
Ais
1011
988Hz
H
1100
Reserved
1101
Reserved
1110
Reserved
1111
Reserved
The following formula defines the beep length:
BeepLength = (Length[3:0] + 1) x 62.5ms
Examples:
Length[3:0]
BeepLength
0000
62.5ms
0001
125ms
0111
500ms
1111
1000ms