PT8R1002 Datasheet, PDF (6/26 Pages) List of Unclassifed Manufacturers – CMOS Zero-IF Radio Transceiver IC for Bluetooth

Preliminary Data Sheet
PT8R1002 CMOS Zero-IF
Radio Transceiver IC for Bluetooth
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Figure 4. BlueRF RXMOD2 Unidirectional baseband interface
BRXD
BRXEN
BTXEN
BPKTCTL
BSEN
BXTLEN
BTXD
BPAEN
BnPWR
BRCLK
BDCLK
BnDEN
BMOSI
BMISO
RXDATA(GPA4)
RXACTIVE(GPA1)
TXACTIVE(GPA0)
SYNCDETECT(GPA5)
GPD4(optional)
GPD5(optional)
TXDATA(GPA3)
TXDATA_EN(GPA2)
RFRESET(GPA7)
DATACLK(GPA6)
Bluetooth
Radio
Transceiver
Baseband
Interface
(Unidirectional,
BLUERF_TCK(GPA8)
JTAG SPI)
BLUERF_TMS(GPA9)
BLUERF_TDI(GPA10)
BLUERF_TDO(GPA11)
The unidirectional mode allows the PT8R1002 to be controlled
with minimum reference to the previous state of the interface.
This allows the state of PT8R1002 to be inferred by examin-
ing the logic levels on the interface signals. The unidirec-
tional interface can be split into two subsections: RF data and
control path, register control interface. In BlueRF interface,
ten signals are used in the RF data and control path, and four in
the register control interface. All of the signals are unidirec-
tional. However, the BSEN (Hop frequency synthesizer en-
able) and BXTLEN (a strobe which enables the RF oscillator)
are not supported as explicit signal in the PT8R1002. Instead,
these equivalents functions can be supported using serial pro-
gramming through JTAG interface. The unidirectional inter-
face requires that the PT8R1002 control registers interface to
the Baseband via an IEEE 1149.1 JTAG interface. The unidi-
rectional interface requires that the Baseband portion of the
interface is referenced to a Baseband generated clock.
Bidirectional interface
The bidirectional mode provides the lowest pin count inter-
face between the baseband and RF piece. The interface con-
nections for bidirectional mode are shown as follows:
As similar to unidirectional interface, the bidirectional inter-
face can be split into two subsections: RF data and control
path, register control interface. The bidirectional interface uses
a DBus control register interface. In BlueRF interface, five
signals are used in the RF data and control path, and three in
the register control interface. There are two bidirectional sig-
nals such as BTXD and BDDATA. The direction of the two
bidirectional pads (BTXD, BDDATA) is controlled by separate
state machine in the baseband and PT8R1002. The baseband
state machine is the master and controls the state machine in
the PT8R1002 in an open loop manner. To prevent bidirec-
tional data contention, baseband must ensure not to occur
during reset and normal operation.
PT0124(12/04)
6
Ver:2