msm7712 Oki Semiconductor, msm7712 Datasheet - Page 10

• Manufacturer Part Number: msm7712
• Description: Wireless Lan Baseband Controller
• Manufacturer: Oki Semiconductor

Radio Interface
The radio interface supports simple, flexible control of the radio and its synthesizer. The control signal
timing is programmable by the processor. Figure 4 shows the connection to a typical radio architecture.
Radio Interface Signal Descriptions
10
RXC1
TXC, TXC2
RADPWR
ANT
SLICE
MSM7712
Pin Name
Oki Semiconductor
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Open-collector/drain Output
Open-collector/drain Output
Open-collector/drain output
Open-collector output
Open-collector/drain output
Direction
LNA
PA
Radio
1LO
Figure 4. Typical FH Radio Interface
When asserted reception is enabled. RXC1 is always asserted during reception. This signal is
When asserted transmission is enabled. Both signals are programmable to be open-collector
This pin selects one of two antennas for transmission or reception.
This control pin determines the response time constant of an analog data slicer when using the
programmable to be open-collector (active low) or open-drain (active high).
(active low) or open-drain (active high). Transmit is only activated following a receive (where
Clear Channel Assessment is performed). The timing of TXC1 and TXC2 at the start of a transmit
is programmable from the deassertion of RXC1. RXC2 is typically used for TX Power Amplifier
switching, and its assertion depends on the power control mode selected in the MSM7712.
This pin is asserted to power up the radio circuitry (i.e. local oscillators) for reception. The pin
is programmable to be open-collector (active low) or open-drain (active high).
internal modem with an analog data slicer circuit (options MSEL-0 or 1). This pin is program-
mable to be open-collector (active low) or open-drain (active high). The pin is asserted when
CCA has determined a valid IEEE 802.11 GH signal (preamble is detected).
2LO
Disc
+
-
DAC
DAC
CSN
D
Description
RADPWR
RXC1
SLICE
RXD
RSSITH
DACEN
SYNCLK
SYNDAT
SYNLEN
LKDET
IFD[5:0]
TXC1
TXC2
ANT
MSM7712