Data Sheet

LC840PA
Datasheet
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Recommended Operating Parameters Notes:
frequency of 1/5us = 200kHz. Similarly, if acquisition time of 40us chosen, then the conversion time is 42us and
the maximum sampling frequency is 1/42us = 23.8 kHz.
Note 3
ADC input impedance is estimated mean impedance of the ADC (AIN) pins.
3.4 Programmability
3.4.1 LC840PA Default Firmware
The LC840PA module comes loaded with a customer specific Laird ProFLEX-like firmware application that is
IEEE802.15.4 compliant. This firmware enables backwards compatibility with the Laird ProFLEX01-R2 module
firmware.
If Bluetooth LE operation is desired, it is recommended to use the Laird BL654PA module.
3.4.2 BL654PA Special Function Pins in smartBASIC
Refer to the smartBASIC extension manual for details of functionality connected to this:
▪ nAutoRUN pin (SIO_35), see Table 6 for default
▪ VSP pin (SIO_02), see Table 7 for default
▪ SIO_38 – Reserved for future use. Do not connect. See Table 8
Table 6: nAutoRUN pin
Signal Name
Pin #
I/O
Comments
nAutoRUN /(SIO_35)
5
I
Input with active low logic. Internal pull down (default).
Operating mode selected by nAutoRun pin status:
▪ Self-contained Run mode (nAutoRUN pin held at 0V).
▪ If Low (0V), runs $autorun$ if it exists
▪ Interactive/Development mode (nAutoRUN pin held at VCC).
▪ If High (VCC), runs via at+run (and file name of application)
In the development board nAutoRUN pin is connected so that the state is driven by the host’s DTR output line.
Table 7: VSP mode
Signal Name
Pin #
I/O
Comments
SIO_02
50
I
Internal pull down (default).
VSP mode selected by externally pulling-up SIO_02 pin:
High (VCC), then OTA smartBASIC application download is possible.
Table 8: SIO_38
Signal Name
Pin #
I/O
Comments
SIO_38
63
I
Internal pull up (default).
Reserved for future use. Do not connect if using smartBASIC FW.