Oki BISM2 manual Features, Gpio

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2. Features

Feature	Implementation
Bluetooth Transmission	Class 1
Fully Bluetooth pre-qualified	Bluetooth 2.0
Range	250 metres typical (free space)
Frequency	2.400 – 2.485 GHz
Max Transmit Power	+6dBm
Min Transmit Power	-27dBm
Receive Sensitivity	Better than -86dB
Data Transfer rate	Up to 300Kbps
Serial Interface	RS-232 bi-directional for commands and data using AT commands
Serial parameters	Default 9600,n,8,1 - Configurable from 1,200bps to 961,200 bps.
	Support for DTR, DSR, DCD, RI, RTS, CTS
Physical size	22.8 x 33.8 x 7.6 mm, 8g
	24.0 x 69.0 x 7.6mm, 9g (BISM1 Form Factor)
Current consumption	Typically 22mA during data transfer in standard power mode. Lower
	powers are attainable with a configurable low power mode.
Low power sniff mode	2.5mA typ
Temperature Range	Normal operation: -40°C to +85°C
Supply Voltage	3.6V – 7.0V
Brown-out	Integrated brown out detection
Interface Levels	3.3V Logic
Audio	Audio can be transferred over SCO channels through the PCM interface
	at 64kbps. PCM can be configured as master or slave.
Profiles	FTP Server, SPP, DUN, FTP, Audio Gateway, Headset, Handsfree
Multipoint	Max 7 slaves
Field upgradeable	Over UART
	Single point firmware is controlled and configured using AT
	Commands. Standard multipoint firmware uses a simple packet based
Protocols	protocol and requires a host to enable the module to function
	effectively.
	Single point only allows a point to point connection whereas multipoint
	allows more than one simultaneous connection.
GPIO	9 x digital
	2 x analogue (8 bit resolution)
Indicators	1 x programmable LED (small form factor board only)
Lead free	Lead-free and RoHS compliant