LISA-U1 series - System Integration Manual
3G.G2-HW-10002-3
Preliminary
System description
Page 13 of 125
Function
Pin
No
I/O
Description
Remarks
USB_D-
26
I/O
USB Data Line D-
90
Ω
nominal differential impedance
Pull-up or pull-down resistors and external series
resistors as required by the
USB 2.0 high-speed
specification
[7] are part of the USB pad driver and
need not be provided externally.
Provide access to the pin for FW update and
debugging if the USB interface is not connected to
the application processor.
See section 1.9.3
USB_D+
27
I/O
USB Data Line D+
90
Ω
nominal differential impedance
Pull-up or pull-down resistors and external series
resistors as required by the
USB 2.0 high-speed
specification
[7] are part of the USB pad driver and
need not be provided externally.
Provide access to the pin for FW update and
debugging if the USB interface is not connected to
the application processor.
See section 1.9.3
System
PWR_ON
19
I
Power-on input
PWR_ON
pin has high input impedance.
Do not keep floating in noisy environment:
external pull-up required.
See section 1.6.1
RESET_N
22
I
External reset input
Internal 10 k
Ω
pull-up to
V_BCKP
(2.3 V).
See section 1.6.3
Audio
(LISA-U120,
LISA-U130
versions only)
I2S_CLK
43
O
I
2
S clock
Check device specifications to ensure compatibility
to module supported modes.
See section 1.11.2.
I2S_RXD
44
I
I
2
S receive data
Internal active pull-up to
V_INT
(1.8 V) enabled.
Check device specifications to ensure compatibility
to module supported modes.
See section 1.11.2.
I2S_TXD
42
O
I
2
S transmit data
Check device specifications to ensure compatibility
to module supported modes.
See section 1.11.2.
I2S_WA
41
O
I
2
S word alignment
Check device specifications to ensure compatibility
to module supported modes.
See section 1.11.2.
MIC_N
39
I
Differential analog
audio input (negative)
Differential analog input shared for all analog path
modes: handset, headset, hands-free mode.
Internal DC blocking capacitor.
See section 1.11.1
MIC_P
40
I
Differential analog
audio input (positive)
Differential analog input shared for all analog path
modes: handset, headset, hands-free mode.
Internal DC blocking capacitor.
See section 1.11.1
SPK_P
53
O
Differential analog
audio output (positive)
Differential analog audio output shared for all
analog path modes: earpiece, headset and
loudspeaker mode.
See section 1.11.1
SPK_N
54
O
Differential analog
audio output (negative)
Differential analog audio output shared for all
analog path modes: earpiece, headset and
loudspeaker mode.
See section 1.11.1
Reserved
RSVD
5
N/A
RESERVED pin
This pin must be connected to ground
See section 1.13
RSVD
52
N/A
RESERVED pin
Do not connect
See section 1.13
RSVD
74
N/A
RESERVED pin
Do not connect
See section 1.13
