FEDL7033-02
ML7033
1
Semiconductor
CR9-B0, CR10-B7 to B0 …CH1 Tone Generator 1 Output Frequency Select
When the CH1RING (CR11-B3) bit is cleared (“0”), these 9 bits determine the output
frequency of tone generator 1 on channel 1 to a value between 300 and 3400 Hz at 10Hz
intervals. A sample list of frequencies is shown in Table 13. The value programmed into
this field is calculated based on the desired frequency using the following equation.
Binary data for CR9-B0, CR10-B7 to B0
= (Output Frequency [Hz])/10
The following is an example of how to program this field when the intended frequency is
1500 Hz;
Ex) (Output Frequency [Hz])/10 = 1500/10 = 150d = 10010110b
Bits to set in CR9-B0, CR10-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 13 Tone Generator Frequency Setting (CH1RING bit = “0”)
CR9
CR10
B4
1
1
0
:
Frequency
(Hz)
decimal
hex
B0
0
0
0
:
B7
0
0
0
:
B6
0
0
0
:
B5
0
0
1
:
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
37/51
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