pcf26100 NXP Semiconductors, pcf26100 Datasheet - Page 8

• Manufacturer Part Number: pcf26100
• Description: Bluetooth Adapter Ic
• Manufacturer: NXP Semiconductors

Philips Semiconductors
6
6.1
The adapter features a Power-on reset which is used to
reset the adapter logic. There is also a POR_EXT signal
which is used for controlling the reset of the PCF26100
within the application.
The system clock for the application is generated by the
PCF26100. The system clock is then provided to the
baseband SYS_CLK and the radio REF_CLK. Both the
SYS_CLK and REF_CLK clocks are controlled within the
PCF26100.
From the system clock a low-power 3.2 kHz clock
LPO_CLK is generated.
From the PCF26100 a 1 MHz TX_CLK is generated to be
used in the baseband controller to clock out the transmit
data on TX_DATA.
The serial interface to the baseband controller is a JTAG
interface. This interface is used to initialize and control the
PCF26100 and subsequently the radio. The channel
information received from the JTAG interface is converted
and forwarded to the radio 3-wire S-bus interface.
The timing control signals to the UAA3558 radio are
generated in the PCF26100. For this a minimum number
of reference timing signals from the baseband controller
are used. The exact timing of the control signals is
programmable in the PCF26100.
The PCF26100 converts the digital transmit data from the
baseband controller to analog gaussian shaped transmit
data to the radio.
The analog RSSI from the radio is converted to digital and
made available to the baseband controller via the JTAG
interface.
2001 Jun 19
Bluetooth Adapter IC
FUNCTIONAL DESCRIPTION
PCF26100 overview
8
The digital power amplifier control information
communicated from the baseband controller to the
PCF26100 is converted to an analog control voltage for the
radio.
The PCF26100 provides an identification number, which
can be read by the baseband controller through the JTAG
interface.
For frequency compensation and tuning, the PCF26100
provides a tuning capability on the system oscillator.
6.2
Table 2 Adapter and BlueRF unidirectional pin mapping.
POR_EXT
POR
LPO_CLK
SYS_CLK
SYS_CLK_REQ
TX_CLK
TX_DATA
RX_DATA
SYNTH_ON
PX_ON
SI_CMS
SI_CLK
SI_CDI
SI_CDO
VIO_POWER
BASEBAND PIN NAME
BlueRF pin mapping
ADAPTER TO
BLUERF PIN NAME JTAG
BnPWR
not applicable
not applicable
not applicable
BXTLEN
BRCLK
BTXD/BDATA1
BRXD
BSEN
BPKTCTL/BDATA2
BnDEN
BDCLK
BMOSI/BDDATA
BMISO
not applicable
Preliminary specification
UNIDIRECTIONAL
RXMODE 2
PCF26100