User Manual

BM62/64
Preliminary
DS60001403C-Page 18
 2017 Microchip Technology Inc.
2.3 Auxiliary Port
The BM62/64 module supports one analog (line-in) sig-
nal from the external audio source. The analog (line-in)
signal can be processed by the DSP to generate differ-
ent sound effects (Multi-band dynamic range compres-
sion and audio widening), which can be configured by
using the DSP tool.
2.4 Analog Speaker Output
The BM62/64 module supports the following analog
speaker output modes:
• Capless mode — Recommended for headphone
applications in which capless output connection
helps to save the BOM cost by avoiding a large
DC blocking capacitor. Figure 2-7 illustrates the
analog speaker output capless mode
• Single-ended mode — Used for driving an exter-
nal audio amplifier where a DC blocking capacitor
is required. Figure 2-8 illustrates the analog
speaker output single-ended mode
FIGURE 2-7: ANALOG SPEAKER OUTPUT CAPLESS MODE
FIGURE 2-8: ANALOG SPEAKER OUTPUT SINGLE-ENDED MODE