LISA-U2 series - System integration manual
UBX-13001118 - R27
Design-In
Page 119 of 183
C1-Public
2.2
Design Guidelines for Layout
The following design guidelines must be met for optimal integration of LISA-U2 modules on the final
application board.
2.2.1
Layout guidelines per pin function
This section groups LISA-U2 modules pins by signal function and provides a ranking of importance in
layout design.
V_BCKP
GND
V_INT
RSVD
GND
GND
GND
DSR
RI
DCD
DTR
GND
RTS
CTS
TXD
RXD
GND
VUSB_DET
PWR_ON
GPIO1
GPIO2
RESET_N
GPIO3
GPIO4
GND
USB_D-
USB_D+
2
3
4
5
6
7
8
9
10
11
12
1
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
GND
VCC
VCC
VCC
GND
SPI_MRDY / GPIO14
SPI_SRDY / GPIO13
SPI_MISO
/ GPIO12
SPI_MOSI
/ GPIO11
SPI_SCLK
/ GPIO10
GPIO9 / I2S1_WA
GND
GPIO8 / I2S1_CLK
RSVD /
CODEC_CLK
GPIO5
VSIM
SIM_RST
SIM_IO
SIM_CLK
SDA
SCL
RSVD / I2S_RXD
RSVD / I2S_CLK
RSVD / I2S_TXD
RSVD / I2S_WA
GPIO7 / I2S1_TXD
GPIO6 / I2S1_RXD
64
63
62
61
60
59
58
57
56
55
54
65
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
29 30 31 32 33
34 35 36 37 38
28
GN
D
GN
D
GN
D
GN
D
GN
D
G
N
D
GN
D
GN
D
GN
D
GN
D
GN
D
75 74 73 72 71 70 69 68 67 66
76
GN
D
GN
D
GN
D
GN
D
G
N
D
GN
D
A
N
T
GN
D
GN
D
GN
D
/ RS
V
D
A
N
T
_D
IV
LISA-U2 series
(Top View)
Very Important
Careful Layout
Common Practice
Legend:
Figure 55: LISA-U2 series modules pin-out (top view) with ranked importance for layout design