Singlestone
PBA 313 07
Preliminary Product Overview
4/2004
12
2.7 System Integration and Applications
2.7.1 General description
On the RF-side, Singlestone provides a 50 Ohm single-ended input/output to be directly connected to
an external antenna. The design of the antenna is open to a broad spectrum (e.g. PCB antenna,
ceramic antenna, external antenna) and can be optimized to the target application requirements.
The HCI-interface is implemented as a full-duplex UART port which can be configured to be used in 2-
line or 4-line mode (with or without hardware handshake). If hardware handshake is not used then the
UARTCTS pin must be grounded.
The PCM interface is able to serve one Bluetooth SCO channel for voice data. Optionally, SCO
channels may be linked to the host via the HCI-UART interface.
Both the UART- and PCM-interfaces are assigned to the regulated voltage (2.7V) powered by
VSUPPLY. VSUPPLY must be in the range of 3.0 to 4.75 V.
General purpose input/output lines (GPIOs) can be controlled via HCI+ commands.
Configuration data (e.g. Bluetooth device address) are loaded from internal E
2
PROM after reset.
Optionally, configuration data may be provided by the host via HCI+ commands.
