DVK-BT900-SA-03 データシートの表示（PDF） - Unspecified
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DVK-BT900-SA-03 Datasheet PDF : 47 Pages
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BT900-Sx
Datasheet
Internal
Pin
#
Pin
Name
Default Alternate
Funct. Funct.
Default
Direction
Supply
Domain
Pull-up or
Pull-down
Notes Comment
State
43
BT_VDD_IO
IN
only
3.3V or
1.8V
See Table 4
16
44
UART_RX
45
UART_TX
46
UART_RTS
DIO
SIO_0
or WKUP2
IN
DIO
SIO_1
OUT
DIO
SIO_2
OUT
1, 2, 6,
UARTCLOSE()
VCC
Pull-up
7, 12,
selects DIO
15
functionality
VCC
Set high in
FW
1, 2, 6,
7, 15
and UARTOPEN()
selects
VCC
Set low in
FW
1, 2, 6,
7, 15
UART comms
behaviour
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.
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/bluetooth
11
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