AK4636 Datasheet, PDF (61/105 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP

[AK4636]
BPLVL2
BPLVL1
BPLVL0
BEEP Gain
AOUT
SPK
(LOVL =“0”) (SPKG1-0 bits = “00”)
0
0
0
0dB
1.5Vpp
5.08Vpp
(default)
0
0
1
−3dB
1.06Vpp
3.60Vpp
0
1
0
−6dB
0.75Vpp
2.55Vpp
0
1
1
−12dB
0.38Vpp
1.28Vpp
1
0
0
−18dB
0.19Vpp
0.64Vpp
1
0
1
−23dB
0.10Vpp
0.36Vpp
1
1
0
−29dB
0.05Vpp
0.18Vpp
1
1
1
−34dB
0.03Vpp
0.10Vpp
Table 46. BEEP Output Gain Setting when BPM 1-0 bits = “01” (BEEP input =1.5Vpp)
2. BEEP Signal Generating Circuit
The AK4636 integrates a BEPP signal generating circuit. When BPM 1-0 bits = “11”, the speaker amplifier outputs
BEEP signal by setting BEEPS bit = “1”, and the Mono lineout amplifier outputs BEEP signal by setting BEEPA bit =
“1”.
After outputting the signal during the time set by BPON7-0 bits, the AK4636 stops the output signal during the time set by
BPOFF7-0 bits (Figure 50). The repeat count is set by BPTM6-0 bit, and the output level is set by BPLVL2-0 bits. When
BPCNT bit is “0”, if BPOUT bit is written “1”, the AK4636 outputs the beep for the times of repeat count. When the
output is finished, BPOUT bit is set to “0” automatically. When BPCNT bit is set to “1”, it outputs the beep in succession
regardless of repeat count, on-time and off-time. The output frequency is set by BPFR1-0 bits.
< Setting parameter >
1) Output Frequency ( Table 47 ~ Table 49)
2) ON Time (Table 50)
3) OFF Time (Table 51)
4) Repeat Count (Table 52)
5) Output Level (Table 53)
* BPFR1-0, BPON7-0, BPOFF7-0, BPTM6-0 and BPLVL3-0 bits should be set when BPOUT
=BPCNT = “0”.
* BPCNT bit is given priority in BPOUT bit. When BPOUT bit be set to “1”, if BPCNT bit is set to
“0”, BPOUT bit is set to “0” forcibly.
* When stopping the BEEP outputs by changing BPCNT bit to “0” from “1”, writing to BPOUT bit
and BPCNT bit are inhibited for 10ms.
BEEP Output
ON Time
OFF Time
Repeat Count
Figure 50. BEEP Signal Output
MS1012-E-01
- 61 -
2010/08