Harman Kardon AVR 171/230 Service Manual page 112

Harman Kardon
25 CHG_EXT
26 VBAT_SENSE
27 VBAT
28 GND
29 1V8_SMPS
30 VDD_PADS
31 PIO9
32 PIO0
33 PIO6
34 PIO18
35 PIO19
36 GND
37 USB_N
38 USB_P
39 PIO7
40 PIO1
41 PIO8
42 PIO21
43 PIO20
44 LED2
45 GND
46 MIC_BIAS
47 MIC_RN
48 MIC_RP
49 MIC_LN
50 MIC_LP
51 AGND
52 SPK_RN
53 SPK_RP
54 SPK_LN
55 SPK_LP
56 GND
57 RF_IN
58 GND
Spec-BM840-V1.1
®
Power IN
GND
Power out
Power IN
Bi-directional
Bi-directional
Bi-directional
Bi-directional
Bi-directional
GND
Bi-directional
Bi-directional
Bi-directional
Bi-directional
Bi-directional
Bi-directional
Bi-directional
Bi-directional
GND
Analogue out
Analogue in
Analogue in
Analogue in
Analogue in
Analogue
Analogue out
Analogue out
Analogue out
Analogue out
GND
GND
GND
Page 4 of 7
Typically connected to VBUS (USB supply) as Section
12 shows.
External battery charger control.
External battery charger transistor base control when
using external charger boost. Otherwise leave
unconnected.
Battery charger sense input.
Connect directly to the battery positive pin.
Battery positive terminal.
Ground
Serial Peripheral Interface Clock
Positive supply input for input/output ports
Programmable Input/Output Line
Alternative functions:
■ UART_CTS: UART clear to send, active low
Programmable Input/Output Line
Alternative functions:
■ UART_RX: UART data input
Programmable Input/Output Line
Programmable Input/Output Line
Programmable Input/Output Line
Ground
USB data minus
USB data plus with selectable internal 1.5kΩ pull-up
resistor
Programmable Input/Output Line
Programmable Input/Output Line
Alternative functions:
■ UART_TX: UART data output
Programmable Input/Output Line
Alternative functions:
■ UART_RTS: UART request to
send, active low
Programmable Input/Output Line
Programmable Input/Output Line
LED driver.
Alternative function: programmable output PIO[31]
Ground
Microphone bias
Microphone input negative, channel A
Microphone input positive, channel A
Microphone input negative, channel B
Microphone input positive, channel B
Ground connection for audio and audio driver.
Speaker A output negative, right
Speaker A output positive, right
Speaker A output negative, left
Speaker A output positive, left
Ground
Bluetooth 50Ω transmitter output /receiver input
Ground
AVR 171 Service Manual
Product Specification
www.sunitec.com.tw
Page 112 of 174