LISA-C2 series and FW75-C200 - System Integration Manual
UBX-13000620 - R21
Early Production Information
Design-In
Page 56 of 103
Rank Function
Pin(s)
Layout
Remarks
1
st
RF Connector
Very Important
Design for 50
Ω
characteristic impedance.
2
nd
Main DC Supply
Very Important
VCC
line should be wide and short. Route
away from sensitive analog signals.
3
rd
USB Signals
Very Important
Route USB_D+ and USB_D- as differential lines:
design for 90
Ω
differential impedance.
4
th
Analog Audio
Careful Layout
Avoid coupling with noisy signals.
Audio Inputs
MIC_P, MIC_N
Audio Outputs
SPK_P, SPK_N
5
th
Ground
GND
Careful Layout
Provide proper grounding.
6
th
Sensitive Pin :
Careful Layout
Avoid coupling with noisy signals.
Power-on
PWR_ON
HW_SHUTDOWN
HW_SHUTDOWN
RESET_N
RESET_N
7
th
Digital pins and supplies:
Common Practice
Follow common practice rules for digital pin
routing.
SIM Card Interface
VSIM, SIM_CLK,
SIM_IO, SIM_RST
UART
TXD, RXD, CTS,
RTS, RI
General Purpose I/O
1
GPIO1, GPIO2,
GPIO3, GPIO4,
GPIO5
USB detection
VUSB_DET
I2C
1
SDA,SCL
PCM Audio
1
PCM_SYNC,
PCM_DO,
PCM_CLK, PCM_DI
Supply for Interfaces
V_INT
Table 29: Pin list in order of decreasing importance for layout design
1
LISA-C200