Texas Instruments SimpleLink Wi-Fi CC3 20 Series, Руководство пользователя

Страница: 21 / 24

10 Insertion Loss Calibration
The TX power levels and RX sensitivity numbers quoted in the data sheet are at the device RF pin. Additional
losses due to onboard filter, PCB trace, connectors, and cables used to connect to the external RF equipment
should be accounted for separately by adding their insertion losses.
On the TI EVMs, the onboard filter insertion loss is typically 1 dB (maximum of 1.35 dB); the PCB trace plus RF
connector loss is approximately 0.4 dB. These losses must be accounted for while evaluating the performance. If
the user has a different filter or a different trace on their PCB, they must measure their insertion loss separately.
The insertion loss of the cable used to connect the EVM to the external equipment can be measured using a
network analyzer.
11 Hardware Connections on Non-TI EVMs
To use the Radio Tool on platforms other than TI EVMs, the interface signals from the emulation board can be
wired to the corresponding pins on the custom platform (see
Table 11-1 , Table 11-2 , and Table 11-3 ). The signal
voltage level from the emulation board LaunchPad™ is 3.3 V, and the V
CC
level is 3.3 V. This V
CC
can also be
used to power the CC31xx and CC32xx devices on the custom platform. Make sure the I/O voltage levels
between the emulation board and the device on the EVM are the same.
Table 11-1. Connections for CC31XXEMUBOOST to a Custom CC31xx Platform (UART Connection)
Signal Name CC31xx Pin CC31XXEMUBOOST Pin
VCC P1.1
UART1_TX 55 P1.3
UART1_RX 57 P1.4
UART1_CTS 61 P4.4
UART1_RTS 50 P4.5
GND P2.1
nHIB 2 P1.5
Table 11-2. Connections for CC31XXEMUBOOST to a Custom CC31xx Platform (SPI Connection)
Signal Name CC31xx Pin CC31XXEMUBOOST Pin
VCC P1.1
SPI_CLK 5 P1.7
SPI_MOSI 6 P2.6
SPI_MISO 7 P2.7
SPI_CSn 8 P2.3
IRQ 15 P2.2
GND P2.1
nHIB 2 P1.5
Table 11-3. Connections from CC32xx-LAUNCHXL to a Custom CC32xx Platform
Signal Name CC32xx Pin CC32xx-LAUNCHXL Pin (Rev B)
VCC J12 pin 2 (remove J12 jumper)
UART1_TX 55 J7 pin 3 (remove J7 jumper)
UART1_RX 57 J6 pin 3 (remove J6 jumper)
GND P2.1
www.ti.com Insertion Loss Calibration
SWRU471B – FEBRUARY 2017 – REVISED AUGUST 2020
Submit Document Feedback
SimpleLink™ Wi-Fi® CC3x20, CC3x3x Radio Tool User Guide 21
Copyright © 2020 Texas Instruments Incorporated