AK4632VN AKM [Asahi Kasei Microsystems], AK4632VN Datasheet - Page 34

• Manufacturer Part Number: AK4632VN
• Description: 16-Bit ?? Mono CODEC with ALC & MIC/SPK/Video-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

ASAHI KASEI
The AK4632 has a digital output volume (256 levels, 0.5dB step, Mute). The volume can be set by the DVOL7-0 bits. The
volume is included in front of a DAC block, a input data of DAC is changed from +12 to –115dB with MUTE. This
volume has a soft transition function. It takes 1061/fs or 256/fs from 00H to FFH.
When the PMBP bit is set to “1”, the beep input is powered-up. And when the BEEPS bit is set to “1”, the input signal
from the BEEP pin is output to Speaker-Amp. When the BEEPA bit is set to “1”, the input signal from the BEEP pin is
output to the mono line output amplifier. The external resister Ri adjusts the signal level of BEEP input. The gains are
shown in Table 18, when Ri = 20kΩ. These gain are in inverse proportion to Ri.
MS0396-E-00
BEEP Input
Digital Output Volume
SPKG1-0 bits
DVTM bit
00
01
10
11
0
1
BEEP
Table 16. Digital Output Volume Code Table
Table 18. Beep input gain at R
Figure 32. Block Diagram of BEEP pin
BEEP
Transition Time
The transition time from 00H to FFH of DVOL7-0 bits
Table 17.Setting of transition time
DVOL7-0
1061/fs
256/fs
FDH
FEH
FFH
00H
01H
02H
18H
+14.11dB
+16.15dB
+7.89dB
+9.93dB
•
•
SPP/SPN Gain
Ri
- 34 -
MUTE (−∞)
−114.5dB
−115.0dB
+12.0dB
+11.5dB
+11.0dB
133msec
Gain
fs=8kHz
0dB
32msec
•
•
-
+
Rf
i
= 20kΩ
BEEP
Default
0dB
0dB
0dB
0dB
AOUT Gain
fs=22.05kHz
48msec
12msec
[AK4632]
2005/06