SWAU132 April 2024
The CC3351 BoosterPack has 2 x 20 pin connectors that provide access to many of the CC3351 pins and features. The signal assignment on these 2x20 pin connectors is shown in the figure below and described in Table 3-3 and Table 3-4.
Pin | Name (in schematic) | Type/ Direction | Description |
---|---|---|---|
P1.1 | VCC_MCU_3V3 | Input | No functional purpose. |
P1.2 | Reserved | N/A | N/A |
P1.3 | UART_TX_3V3 (from CC3351) | Output | The CC3351 UART TX to host for BLE host controller interface. |
P1.4 | UART_RX_3V3 (to CC3351) | Input | The CC3351 UART RX from host for BLE host controller interface. |
P1.5 | LP_RESET | Input | Reset line for CC3351 used to enable/ disable (active low). Driven by host through LaunchPad pins. |
P1.6 | Reserved | N/A | N/A |
P1.7 | SDIO_CLK_3V3 | Input | SDIO clock or SPI clock. Must be driven by host. |
P1.8 | IRQ_WL_3V3 | Output | Interrupt request from CC3351 to host for Wi-Fi activity. |
P1.9 | COEX_GRANT_3V3 | Output | External coexistence interface - grant (reserved for future use). |
P1.10 | ANT_SEL_3V3 | Output | Antenna select control. |
P1.21 | VCC_MCU_5V | Power | 5V supply to board. |
P1.22 | GND | GND | Board ground |
P1.23 | Reserved | N/A | N/A |
P1.24 | Reserved | N/A | N/A |
P1.25 | Reserved | N/A | N/A |
P1.26 | Reserved | N/A | N/A |
P1.27 | Reserved | N/A | N/A |
P1.28 | Reserved | N/A | N/A |
P1.29 | COEX_REQ_3V3 | Input | External coexistence interface - request (reserved for future use). |
P1.30 | COEX_PRIORITY_3V3 | Input | External coexistence interface - priority (reserved for future use). |
Pin | Name (in schematic) | Type/Direction | Description |
---|---|---|---|
P2.11 | IRQ_BLE_3V3 | Output | Interrupt request from CC3351 to host for BLE activity. |
P2.12 | Reserved | N/A | N/A |
P2.13 | Reserved | N/A | N/A |
P2.14 | SDIO_D0_3V3 (POCI) | Input/Output | SDIO data D0 or SPI POCI. |
P2.15 | SDIO_CMD_3V3 (PICO) | Input/Output | SDIO command or SPI PICO. |
P2.16 | Reserved | N/A | N/A |
P2.17 | FAST_CLK_REQ_3V3 | Output | Fast clock request from CC3351 to host. |
P2.18 | SDIO_D3_3V3 (CS) | Input/Output | SDIO data D3 or SPI CS. |
P2.19 | SLOW_CLK_IN_3V3 | Input | Input for external RTC clock 32.768kHz. |
P2.20 | GND | GND | Board ground |
P2.31 | Reserved | N/A | N/A |
P2.32 | Reserved | N/A | N/A |
P2.33 | Reserved | N/A | N/A |
P2.34 | LOGGER_3V3 | Output | Tracer from CC3351 (UART TX debug logger). |
P2.35 | Reserved | N/A | N/A |
P2.36 | UART_RTS_3V3 (from CC3351) | Output | UART RTS from CC3351 to host for BLE HCI flow control. |
P2.37 | UART_CTS_3V3 (to CC3351) | Input | UART CTS to CC3351 from host for BLE HCI flow control. |
P2.38 | SDIO_D1_3V3 | Input/Output | SDIO data D1. |
P2.39 | SDIO_D2_3V3 | Input/Output | SDIO data D2. |
P2.40 | Reserved | N/A | N/A |