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參數(shù)資料
| 型號： | MSM7712 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | Wireless LAN Baseband Controller |
| 中文描述： | 無線局域網(wǎng)的基帶控制器 |
| 文件頁數(shù)： | 10/20頁 |
| 文件大小： | 157K |
| 代理商： | MSM7712 |
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MSM7712
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10
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
Pin Name
Direction
Description
RXC1
Open-collector/drain Output
When asserted reception is enabled. RXC1 is always asserted during reception. This signal is
programmable to be open-collector (active low) or open-drain (active high).
TXC, TXC2
Open-collector/drain Output
When asserted transmission is enabled. Both signals are programmable to be open-collector
(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.
RADPWR
Open-collector/drain output
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).
ANT
Open-collector output
This pin selects one of two antennas for transmission or reception.
SLICE
Open-collector/drain output
This control pin determines the response time constant of an analog data slicer when using the
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).
Figure 4. Typical FH Radio Interface
RADPWR
RXC1
SLICE
RXD
RSSITH
DACEN
LKDET
SYNCLK
SYNDAT
SYNLEN
IFD[5:0]
TXC1
TXC2
ANT
D
T
Disc
-
+
D
CSN
DAC
1LO
2LO
DAC
LNA
PA
Radio
MSM7712
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