FEDL7033-02
ML7033
1
Semiconductor
CR7-B0, CR8-B7 to B0
…
CH1 Tone Generator 2 (TG2) Frequency Select
These bits define the output frequency from TG2 on CH1. The frequency is between 300
and 3400Hz at 10Hz intervals. The values written to these bits determine the frequency as
shown in the following equation. Refer to Table 11.
Binary data for CR7-B0, CR8-B7 to B0
= (Output Frequency [Hz])/10
Below is an example of how these bits are programmed when the intended frequency is
1500Hz;
Ex) (Output Frequency [Hz])/10 = 1500/10 = 150d = 10010110b
Bits to set in CR7-B0, CR8-B7 to B0 = (0,1,0,0,1,0,1,1,0)
Note that the operations are not guaranteed when these bits define a frequency out of a band
between 300 and 3400 Hz.
Table 11 Tone Generator Frequency Setting
CR7
CR8
Frequency
(Hz)
decimal
hex
B0
0
0
0
:
B7
0
0
0
:
B6
0
0
0
:
B5
0
0
1
:
B4
1
1
0
:
B3
1
1
0
:
B2
1
1
0
:
B1
1
1
0
:
B0
0
1
0
:
300
310
320
:
30
31
32
:
01Eh
01Fh
020h
:
400
410
:
40
41
:
028h
029h
:
0
0
:
0
0
:
0
0
:
1
1
:
0
0
:
1
1
:
0
0
:
0
0
:
0
1
:
1000
1010
:
100
101
:
064h
065h
:
0
0
:
0
0
:
1
1
:
1
1
:
0
0
:
0
0
:
1
1
:
0
0
:
0
1
:
2000
:
200
:
0C8h
:
0
:
1
:
1
:
0
:
0
:
1
:
0
:
0
:
0
:
3000
:
300
:
12Ch
:
1
:
0
:
0
:
1
:
0
:
1
:
1
:
0
:
0
:
3390
3400
339
340
153h
154h
1
1
0
0
1
1
0
0
1
1
0
0
0
1
1
0
1
0
35/51
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