Instruction Manual

46 DS723F1
CS43L21
6.8 Beep Frequency & Timing Configuration (Address 12h)
Note: The DATA_SEL[1:0] bits in reg09h must be set to ‘01’b to enable function control in this register.
Beep Frequency (FREQ[3:0])
Default: 0000
Function:
The frequency of the beep signal can be adjusted from 260.87 Hz to 2181.82 Hz. Beep frequency will scale
directly with sample rate, Fs, but is fixed at the nominal Fs within each speed mode. Refer to Figure 10 on
page 26 for single, multiple and continuous beep configurations using the REPEAT and BEEP bits.
Beep On Time Duration (ONTIME[3:0])
Default: 0000
Function:
The on-duration of the beep signal can be adjusted from approximately 86 ms to 5.2 s. The on-duration will
scale inversely with sample rate, Fs, but is fixed at the nominal Fs within each speed mode. Refer to Figure
10 on page 26 for single-, multiple- and continuous-beep configurations using the REPEAT and BEEP bits.
6.9 Beep Off Time & Volume (Address 13h)
76543210
FREQ3 FREQ2 FREQ1 FREQ0 ONTIME3 ONTIME2 ONTIME1 ONTIME0
FREQ[3:0] Frequency
Fs = 12, 24, 48 or 96
kHz
Pitch
0000 260.87 Hz C4
0001 521.74 Hz C5
0010 585.37 Hz D5
0011 666.67 Hz E5
0100 705.88 Hz F5
0101 774.19 Hz G5
0110 888.89 Hz A5
0111 1000.00 Hz B5
1000 1043.48 Hz C6
1001 1200.00 Hz D6
1010 1333.33 Hz E6
1011 1411.76 Hz F6
1100 1600.00 Hz G6
1101 1714.29 Hz A6
1110 2000.00 Hz B6
1111 2181.82 Hz C7
TIME[3:0]
On Time
Fs = 12, 24, 48 or 96 kHz
0000 86 ms
··· ···
1111 5.2 s
76543210
OFFTIME2 OFFTIME1 OFFTIME0 BPVOL4 BPVOL3 BPVOL2 BPVOL1 BPVOL0