Ingenic Halley5 - AMIC Function Circuit; DMIC; SPEAKER Function Circuit

Halley5 Base Board
X2000 Development Kit User Manual
Copyright® 2005-2021 Ingenic Semiconductor Co., Ltd. All rights reserved.
9
3.2.4 AMIC Function Circuit
MICBIAS is from X2000, and the maximum output current is 3mA, and the voltage of MICBIAS can be adjusted
from 0.9 V to 1.53V by software (typical value is 0.9V).
The 1nF decoupling capacitor C73 at MICBIAS pin is used to eliminate the high frequency noise.
Figure 3-4 Halley5 Base Board AMIC Circuit
3.2.5 DMIC
The base board has a DMIC port, and Halley5 is able to support AMIC and four-channel DMICs recording
at the same time.
Figure 3-5 Halley5 Base Board DMIC Circuit
3.2.6 SPEAKER Function Circuit
X2000 integrates an internal audio CODEC. It outputs two-channel differential audio signals, and PB02 is used
to control the power amplifier.
Figure 3-6 Halley5 Base Board Speaker Circuit
M1
MIC
+
1
-
2
MICLN
MICLP
R66
2.2K
C671uF
C73
NC
C691uF
MICBIAS
R62
2.2K
C72
0.1uF
R106
10K
C113
100pF
DMIC_CLK
DMIC_IN1
DMIC_IN0
DMIC_VDD
FB7 FB
C80
0.1uF
J17
1
2
3
4
5
6
7
3V3P
HPOUTP
SPK-
SPK+
VDD
HPOUTN
SPK1
8 OHM
+
1
-
2
PB02
U8
CS8305E
VO+
1
PVDD
2
VDD
3
IN-
4
IN+
5
SD
6
GND1
7
VO-
8
GND2
9
C701uF
C65
1uF
R65 150K
C681uF
+
CD4
47uF
R64 150K
C64
0.1uF
VDD
R544 10K
DC5V