Read Harman Kardon AVR 161S (serv.man4) Service Manual online
Product Specification
Spec-BM840-V1.1 Page 4 of 7 www.sunitec.com.tw
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Typically connected to VBUS (USB supply) as Section
12 shows.
12 shows.
25
CHG_EXT
External battery charger control.
External battery charger transistor base control when
using external charger boost. Otherwise leave
unconnected.
External battery charger transistor base control when
using external charger boost. Otherwise leave
unconnected.
26
VBAT_SENSE
Battery charger sense input.
Connect directly to the battery positive pin.
Connect directly to the battery positive pin.
27
VBAT
Power IN
Battery positive terminal.
28 GND
GND
Ground
29
1V8_SMPS
Power out
Serial Peripheral Interface Clock
30
VDD_PADS
Power IN
Positive supply input for input/output ports
31
PIO9
Bi-directional
Programmable Input/Output Line
Alternative functions:
■ UART_CTS: UART clear to send, active low
Alternative functions:
■ UART_CTS: UART clear to send, active low
32
PIO0
Bi-directional
Programmable Input/Output Line
Alternative functions:
■ UART_RX: UART data input
Alternative functions:
■ UART_RX: UART data input
33
PIO6
Bi-directional
Programmable Input/Output Line
34
PIO18
Bi-directional
Programmable Input/Output Line
35
PIO19
Bi-directional
Programmable Input/Output Line
36 GND
GND
Ground
37
USB_N
Bi-directional
USB data minus
38
USB_P
Bi-directional
USB data plus with selectable internal 1.5k
Ω pull-up
resistor
39
PIO7
Bi-directional
Programmable Input/Output Line
40
PIO1
Bi-directional
Programmable Input/Output Line
Alternative functions:
■ UART_TX: UART data output
Alternative functions:
■ UART_TX: UART data output
41
PIO8
Bi-directional
Programmable Input/Output Line
Alternative functions:
■ UART_RTS: UART request to
send, active low
Alternative functions:
■ UART_RTS: UART request to
send, active low
42
PIO21
Bi-directional
Programmable Input/Output Line
43
PIO20
Bi-directional
Programmable Input/Output Line
44 LED2
Bi-directional LED
driver.
Alternative function: programmable output PIO[31]
45 GND
GND
Ground
46
MIC_BIAS
Analogue out
Microphone bias
47
MIC_RN
Analogue in
Microphone input negative, channel A
48
MIC_RP
Analogue in
Microphone input positive, channel A
49
MIC_LN
Analogue in
Microphone input negative, channel B
50
MIC_LP
Analogue in
Microphone input positive, channel B
51
AGND
Analogue
Ground connection for audio and audio driver.
52
SPK_RN
Analogue out
Speaker A output negative, right
53
SPK_RP
Analogue out
Speaker A output positive, right
54
SPK_LN
Analogue out
Speaker A output negative, left
55
SPK_LP
Analogue out
Speaker A output positive, left
56 GND
GND
Ground
57 RF_IN GND
Bluetooth
50
Ω transmitter output /receiver input
58 GND
GND
Ground
Harman Kardon
$95$956
6HUYLFH0DQXDO
6HUYLFH0DQXDO
Page 110 of 178
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