User Manual

Stereo Module

2015 Microchip Technology Inc.
Page 6
P
reliminary
Edition
Pin No. Pin type Name Description
9 O SPKL L-channel analog headphone output
10 P VDDA
Positive power supply/reference voltage for CODEC
, no need to add power
to this pin.
11 I MIC1_P Mic 1 mono differential analog positive input
12 I MIC1_N Mic 1 mono differential analog negative input
13 P MIC_BIAS Electric microphone biasing voltage
14 I AIR R-channel single-ended analog inputs
15 I AIL L-channel single-ended analog inputs
16 I RST System Reset Pin, Low: reset
17 P VCC_RF 1.28V RF LDO output, no need to add power to this pin.
18 I/O P0_1
IO
pin
, default pull
-
high input (Note 1)
1. FWD key when class 2 RF (default), active low.
2. Class1 TX Control signal of external RF T/R switch, active high.
19 P VDD_IO Power output , no need to add power to this pin
20 P ADAP_IN 5V Power adaptor input
21 P BAT_IN 3.3V~4.2V Li-Ion battery input
22 - NC No Connection
23 P GND Ground Pin
24 P SYS_PWR
System Power Output
BAT mode: 3.3~4.2V
Adapter mode: 4.0V
25 P BK_OUT 1.8V buck output, no need to add power to this pin
26 I MFB
1.
Power key when in off mode
2. UART_RX_IND: MCU use to wakeup BT (Note 1)
27 I LED1 LED Driver 1
28 I LED2 LED Driver 2
29 I P2_4
IO
pin
, default pull
-
high input
System Configuration,
L: Boot Mode with P2_0 low combination
30 I P0_2
IO
pin
, default pull
-
high input
(Note 1)
Play/Pause key (default), active low.
31 I/O P0_3
IO
pin
, default pull
-
high input (Note 1)
1. REV key (default), active low.
2. Buzzer Signal Output
3. Out_Ind_1
4. Class1 RX Control signal of external RF T/R switch, active high.
32 O HCI_TXD HCI-UART TX data
33 I HCI_RXD HCI-UART RX data
34 I P0_5
IO
pin
, default pull
-
high input
(Note 1)
Volume down (default), active low.
35 I P2_7
IO
pin
, default pull
-
high input
(Note 1)
Volume up key (default), active low.