Cirrus Logic CS42L55 - Manual (Page 53)

DS773F1 53
CS42L55
6.16 Beep Frequency & On Time (Address 14h)
6.16.1 Beep Frequency
Sets the frequency of the beep signal.
Notes:
1. This setting must not change when BEEP is enabled.
2. Beep frequency will scale directly with sample rate, Fs, but is fixed at the nominal Fs within each
speed mode.
7 6 5 4 3 2 1 0
FREQ3 FREQ2 FREQ1 FREQ0 ONTIME3 ONTIME2 ONTIME1 ONTIME0
FREQ[3:0] Frequency (Fs = 12, 24 or 48 kHz)
0000 254.76 Hz
0001 509.51 Hz
0010 571.65 Hz
0011 651.04 Hz
0100 689.34 Hz
0101 756.04 Hz
0110 869.45 Hz
0111 976.56 Hz
1000 1019.02 Hz
1001 1171.88 Hz
1010 1302.08 Hz
1011 1378.67 Hz
1100 1562.50 Hz
1101 1674.11 Hz
1110 1953.13 Hz
1111 2130.68 Hz
Application: “Beep Generator” on page 31