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DVK-BT900-SC-0X Datasheet(PDF) 11 Page - Laird Tech Smart Technology |
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DVK-BT900-SC-0X Datasheet(HTML) 11 Page - Laird Tech Smart Technology |
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11 / 46 page  BT900-Sx Datasheet Embedded Wireless Solutions Support Center: http://ews-support.lairdtech.com www.lairdtech.com/bluetooth 11 © Copyright 2017 Laird. All Rights Reserved Americas: +1-800-492-2320 Europe: +44-1628-858-940 Hong Kong: +852 2923 0610 Pin # Pin Name Default Funct. Alternate Funct. Default Direction Supply Domain Internal Pull-up or Pull-down State Notes Comment 43 BT_VDD_IO IN only 3.3V or 1.8V See Table 4 16 44 UART_RX DIO SIO_0 or WKUP2 IN VCC Pull-up 1, 2, 6, 7, 12, 15 UARTCLOSE() selects DIO functionality and UARTOPEN() selects UART comms behaviour 45 UART_TX DIO SIO_1 OUT VCC Set high in FW 1, 2, 6, 7, 15 46 UART_RTS DIO SIO_2 OUT VCC Set low in FW 1, 2, 6, 7, 15 47 GND - - - - - - - Module Pin Notes: Note 1 Alternate function is selectable in the smartBASIC application. Note 2 DIO – Digital Input or Output. I/O voltage level tracks VCC Note 3 AIN – Analog Input. Note 4 DIO or AIN functionality is selected using the GpioSetFunc() function in smartBASIC. Note 5 AIN configuration selected using GpioSetFunc() function. Note 6 I2C, UART, SPI controlled by xxxOPEN() functions in smartBASIC Note 7 SIO_0 to SIO_3 are DIO by default when $autorun$ app runs on power up. Note 8 Pull the nRESET pin low for minimum 500 nS in order for the BT900 to reset. The BT900 module start-up time is ~1.6 seconds. Start-up time is the time taken from power-up to being able to run a smartBASIC command. Out of this, 1.6 seconds, ~1.3 seconds is for radio initialisation. 1.6 seconds is also the time when coming out of reset through AT command (ATZ) or AT command for factory default (at&f*). For robustness against external interference, you must fit an external pull-up resistor (10K) on nRESET (pin 16) to VCC for BT900 to be out of reset. By default, the module is out of reset (internal weak-pull-up, 33k) when power is applied to the VCC pin Note 9 SPI CS is created by the customer using any spare SIO pin within their smartBASIC application script allowing multi-dropping. Note 10 It is possible to download smart BASIC applications Over the Air (OTA) to the BT900. To enable this feature, SIO_19 must be pulled low to GND externally (on power up). Refer to the firmware release documentation for details. Note 11 You must connect 100 K pull-down resistor on BT_#SEL externally to GND. Note 12 UART_CTS (pin 1), UART_RX (pin 44) and SIO_20/ADC01 (pin 24) are WKUP (wake-up) pins that allow the BT900 module to be woken up from Deep Sleep by the host. smartBASIC function will be added in the future to allow you to select which WKUP pin (or all) from which to wake up. |
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