User Manual

Stereo Module

2015 Microchip Technology Inc.
Page 5
P
reliminary
Edition
1.1 INTERFACE DESCRIPTION
BM20 pin diagram is shown in Figure 1-3. The pin descriptions are shown in Table 1-1
FIGURE 1-3: BM20 PIN DIAGRAM
TABLE 1‐1: BM20 PIN DESCRIPTION
Pin No. Pin type Name Description
1 I/O P0_0
IO
pin
, default pull
-
high input (Note 1)
1. Slide Switch Detector, active low.
2. UART TX_IND, active low.
2 I EAN
Embedded ROM/External Flash enable
H: Embedded; L: External Flash
3 I P3_0
IO
pin
, default
pull
-
high input
(Note 1)
Line-in Detector (default), active low.
4 I P2_0
IO
pin
, default pull
-
high input
System Configuration,
H: Application L: Baseband(IBDK Mode)
5 I/O P1_5
IO
pin
, default pull
-
high input (Note 1)
1. NFC detection pin, active low.
2. Out_Ind_0
3. Slide Switch Detector, active low.
4. Buzzer Signal Output
6 I/O P0_4
IO
pin
, default pull
-
high input. (Note 1)
1. NFC detection pin, active low.
2. Out_Ind_0
7 O
SPKR R-channel analog headphone output
8 O
AOHPM Headphone common mode output/sense input.