Texas Instruments SWRU294, Руководство пользователя, Страница: 30 / 57

SWRU294
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7.3.2 Transceiver GPIO signals
The CC1120 GPIO pins available through the EM connectors on the SmartRF TrxEB are listed in
Table 13. Figure 20 shows where the signals listed Table 12 and Table 13 can be found on the
P7 EM I/O breakout header on SmartRF TrxEB.
TrxEB Signal Name TrxEB Breakout Pin Description
P1_7 P7.8 Transceiver GPIO0
RF_SPI0_MISO P7.18 Transceiver GPIO1 (Shared with EM SPI MISO)
P1_3 P7.4 Transceiver GPIO2
P1_2 / RF_SPI1_SCLK P7.3 Transceiver GPIO3
Table 13
– Strapping overview to transceiver GPIO to an external MCU
(P7.20) GND
(P7.18) GPIO1 / MISO
(P7.16) SPI MOSI
(P7.14) CSn
(P7.12) SCLK
GPIO3
GPIO2 (P7.4)
GPIO0 (P7.8)
RESET (P7.10)
Figure 20
– P7 with strapping to connect external MCU to SmartRF TrxEB
NOTE: Transceiver EM boards from Texas Instruments share much of the same GPIO
routing to the EM connectors. However, the number of GPIO signals available depends on
the transceiver. Please refer to the schematics of your EM board for further details on the
available GPIO.