BISM2 Datasheet, PDF (15/31 Pages) Laird Tech Smart Technology – The BISM2 Bluetooth Serial Module is one of the most compact complete

BISM2 Bluetooth™
Hardware Integration Guide
6.1.2 SPI Bus
The module is a slave device that uses terminals SPI_MOSI, SPI_MISO, SPI_CLK and SPI_CSB. This interface
programs firmware updates at the factory.
Laird supplies a PC based utility to allow firmware upgrade over the UART port. It is highly recommended that
customers use this method for updating firmware.
Note: The designer should be aware that no security protection is built into the hardware or firmware
associated with this port, so the terminals should not be permanently connected in a PC
application.
6.1.3 GPIO Port
Eight lines of programmable bi-directional input/outputs (I/O) are provided that can be accessed either via the
UART port, or Over The Air (OTA) from a second Bluetooth unit. These can be used as data inputs or to
control external equipment. By using these in OTA mode, a BISM module can control and data acquisition
without the need for any additional host processor.
Each of the GPIO [1:8] ports can be independently configured to be either an Input or Output. A selection of
ports can be accessed synchronously.
GPIO 1 and 2 can be configured as event counters.
The ports are powered from Vcc. The mode of these lines can be configured and you can access the lines via
S Registers 621 to 628.
Low latency I/O can be accessed by using Laird’s I/O via an enhanced inquiry process.
6.1.4 PCM CODEC Interface
PCM_OUT, PCM_IN, PCM_CLK and PCM_SYNC carry up to three bi-directional channels of voice data, each
at 8 k samples/s. The format of the PCM samples can be 8-bit A-law, 8-bit μ-law, 13-bit linear, or 16-bit
linear. The PCM_CLK and PCM_SYNC terminals can be configured as inputs or outputs, depending on
whether the module is the Master or Slave of the PCM interface. Please contact a Laird FAE for further
details.
The module is compatible with the Motorola SSI TM interface and interfaces directly to PCM audio devices
including the following:
Compatible Codec Chips
 Winbond W61360 13-bit linear CODEC (Motorola MC145483 compatible)
 OKI MSM7702 single channel A-law and μ-law CODEC
 OKI MSM7705 four channel A-law and μ-law CODEC
The default codec support is for the Winbond W61360
Note: Codec development boards that mate with the Laird Wireless Developers Kit are available for each
of the three codecs listed above.
Embedded Wireless Solutions Support
Center: http://ews-
support.lairdtech.com
www.lairdtech.com/bluetooth
15
Laird
Americas: [phone]
Europe: [phone]
Hong Kong: [phone] x026