User's Manual

UniStone
General Device Overview
Product Overview 12 T3130-8XV10PO5-7600, 2007-01-31
1.5 System Integration
UniStone is optimized for a low bill of material (BOM) and a small PCB size. Figure 1-3
shows a typical application example.
The UART interface is used for Bluetooth HCI communication between the host and
UniStone. When the HCI UART transport layer is used, four interface lines are needed:
two for data (UARTTXD and UARTRXD) and two for hardware flow control (UARTRTS
and UARTCTS). When the HCI Three-Wire UART transport layer is used the hardware
flow control lines are optional. In addition to the standard Bluetooth HCI commands,
UniStone supports a set of Infineon specific commands called HCI+.
Digital audio can either be sent over the HCI interface or over the dedicated PCM/I2S
interface. The PCM/I2S interface is highly configurable.
Low power mode control of UniStone and the host can be implemented in different ways,
either using the dedicated WAKEUP_HOST and WAKEUP_BT signals or using
signaling over the HCI interface. The host can reset UniStone via the RESET# signal.
A low power clock can be connected to CLK32 or generated internally by a low power
oscillator. Power is supplied to a single VSUPPLY input from which internal regulators
can generate all required voltages. The UART and the PCM interfaces have separate
supply voltages so that they can comply with host signaling.
Figure 1-3 Example Bluetooth System
UniStone
UARTRTS
UARTTXD
UARTRXD
UARTCTS
PCMCLK
PCMFR1
PCMIN
PCMOUT
WAKEUP_HOST
WAKEUP_BT
RESET#
CLK32
HOST
UARTPCM / I2S
ANTENNA
RF_ACTIVE
TX_CONF
SLOT_STATE
WLAN
Subsystem
VDDSUP
Power
Supply
Optional
VDDUART VDDPCM