PCF26100 datasheet(8/28 Pages) PHILIPS

8 / 28 page

2001 Jun 19

Philips Semiconductors

Preliminary speciﬁcation

Bluetooth Adapter IC

PCF26100

FUNCTIONAL DESCRIPTION

6.1

PCF26100 overview

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.

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

BlueRF pin mapping

Table 2

Adapter and BlueRF unidirectional pin mapping.

ADAPTER TO

BASEBAND PIN NAME

BLUERF PIN NAME JTAG

UNIDIRECTIONAL

RXMODE 2

POR_EXT

BnPWR

POR

not applicable

LPO_CLK

not applicable

SYS_CLK

not applicable

SYS_CLK_REQ

BXTLEN

TX_CLK

BRCLK

TX_DATA

BTXD/BDATA1

RX_DATA

BRXD

SYNTH_ON

BSEN

PX_ON

BPKTCTL/BDATA2

SI_CMS

BnDEN

SI_CLK

BDCLK

SI_CDI

BMOSI/BDDATA

SI_CDO

BMISO

VIO_POWER

not applicable

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