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參數(shù)資料
| 型號： | W9310 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Direct Sequence Spread Spectrum Transceiver(直接序列擴(kuò)展頻譜收發(fā)器) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP80 |
| 封裝： | PLASTIC, QFP-80 |
| 文件頁數(shù)： | 18/36頁 |
| 文件大小： | 220K |
| 代理商： | W9310 |
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W9310
- 18 -
Half-duplex Operation
The half-duplex data mode is suitable for applications such as packet radio. The W9310 does not
make any assumptions about the higher-level protocol used; it relies on the higher-level protocol to
provide the necessary framing, error correction, preamble, and so forth. The W9310 will transmit and
deliver the data stream without multiplexing any special overhead bits, as in the case of full-duplex
operation. It is the user's responsibility to ensure that each packet transmitted contains enough
preamble bits so that acquisition can be achieved prior to actual data delivery. Similarly, although the
W9310 delivers an equivalent DCD_N signal to the user, the user needs to be aware that invalid
received data will be present at the output because of the hysteresis of the digital phase-locked loop.
Thus the user must also be able to detect the end-of-packet from the data received rather than relying
on the W9310 to signify loss of signal.
LOCKED
RLOCK
Acquisition
Empty
Data
Acquisition
Empty
Data
Data
Transmit
Master
G
1
G
2
Receive
UWDET_N
DSR_N
CTS_N
TX
DCD_N
RX
UWDET_N
LOCKED
RLOCK
DSR_N
CTS_N
TX
DCD_N
RX
* Drawing not to scale and CTS_N and DTR_N assumed to be asserted.
Slave
Transmit
Figure 6. Typical Communication Link Start-up
Because no overhead in multiplexing is required, in full duplex mode the highest data rate
supportable is equivalent to the burst rate of the half-duplex mode. For the W9310, this is set at 160
Kbps using an MO of 30.72 MHz. The relationship between the data rate and the required MO is as
follows:
f
f
192
data
mosc
=
(4)
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