ST5090
Table 10: Control Register CR8 Functions
76543210
f17 f16 f15 f14 f13 f12 f11 f10
Function
msb
lsb Binary equivalent of the decimal number used to calculate f1
Table 11: Control Register CR9 Functions
76543210
f27 f26 f25 f24 f23 f22 f21 f20
Function
msb
lsb Binary equivalent of the decimal number used to calculate f2
Table 12: Control Register CR10 Functions
76543210
DFT HFT
Function
XXXXXX
0 0 (*) Standard Frequency Tone Range
0 1 Halved Frequency Tone Range
1 0 Doubled Frequency Tone Range
1 1 Forbidden
(*) Default values inserted into the Register at Power On.
X reserved, write 0.
Table 13: Control Register CR11 Functions
76543210
BE BI BZ5 BZ4 BZ3 BZ2 BZ1 BZ0
Function
0
Buzzer output disabled (set to 0)
*
1
Buzzer output enabled
0
Duty Cycle is intended as the relative width of logic 1 *
1
Duty cycle is intended as the relative width of logic 0
msb
lsb Binary equivalent of the decimal number used to calculate the
duty cycle.
* state at power on initialization
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