3826OTP Datasheet, PDF (42/91 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

3826 Group (One Time PROM version)
Low Groupt Frequency, High Group
Frequency
Low group frequency and high group frequency are as follows.
(1) Low group frequency
• 697 Hz
• 770 Hz
• 852 Hz
• 941 Hz
(2) High group frequency
• 1209 Hz
• 1336 Hz
• 1477 Hz
• 1633 Hz
Table 9 shows the example of frequency accuracy (at f(XIN)=4
MHz).
1 2 3A
456B
7 ^{8 9C}
* ^0#D
697Hz
770Hz
Low group
852Hz ^frequency
941Hz
High group frequency
Table 9 Example of frequency accuracy (at f(XIN) = 4 MHz)
Fig. 44 Key matrix of telephone and rating frequency
Rating frequency (Hz)
697
770
852
941
1209
1336
1477
1633
n (Timer value)
89
80
72
65
51
46
41
37
Output frequency (Hz)
694.4
771.6
856.2
946.9
1201.9
1329.7
1488.1
1644.7
Error frequency (Hz)
–2.6
1.6
4.2
5.9
–7.1
–6.3
11.1
11.7
Deviation (%)
–0.367
0.208
0.488
0.630
–0.580
–0.460
0.750
0.720
Rev.1.00 Sep 06, 2006 page 42 of 88
REJ03B0181-0100