User's Manual

BM63SPKA1MGA
ISSC Confidential (Version: 1.2) - 19 - 10/15/2014
MIC AMP
+
-
LINE AMP
+
-
MICP1
MICN1
AIL
1-bit
SD ADC
Digital
Codec
DSP
Core
MIC Boost Gain
0dB or 20dB
PGA Analog Gain
-6 ~ 26dB in 1dB step
ADC Digital Gain
-54 ~ 4.85dB
Fixed in 0dB now
DSP Digital Gain
-96 ~ 0dB in 6dB step
Fixed in 0dB now
System Gain = MIC Boost Gain + PGA Analog Gain + ADC Digital Gain + DSP Digital Gain
MIC Boost Gain and PGA Gain are controlled by DSP F/W
(1) MIC mode:
(a) There are 16 gain levels: 46/43/40/37/34/31/28/25/22/19/16/13/10/7/4/0 dB
(b) 46/43/40/37 dB gain levels are normally used for MIC mode
(2) Line-in mode:
(a) MIC boost gain = 0 dB
(b) PGA analog gain = 0 dB
(c) ADC digital gain = 0 dB
(d) DSP digital gain = 0 dB
(e) Gain control for line-in mode is recommended to be done by DAC side
Note: For I
2
S digital audio output, no gain control in BM63 so far and it is controlled by external DAC
MIC AMP
+
-
LINE AMP
+
-
MICP1
MICN1
AIL
1-bit
SD ADC
Digital
Codec
DSP
Core
MIC Boost Gain
0dB or 20dB
PGA Analog Gain
-6 ~ 26dB in 1dB step
ADC Digital Gain
-54 ~ 4.85dB
Fixed in 0dB now
DSP Digital Gain
-96 ~ 0dB in 6dB step
Fixed in 0dB now
BT
RF/MAC
External
MCU
External
DSP/DAC
(YDA174)
I
2
S
I
2
C
Digital/Analog
Gain Control
UART
A2DP down link
&
SCO down link
SCO up link
Line-in mode