參數(shù)資料
型號(hào)： FX579
英文描述： Half Duplex GMSK Modem
中文描述： 半雙工GMSK調(diào)制解調(diào)器
文件頁(yè)數(shù)： 16/23頁(yè)
文件大?。?/td> 582K
代理商： FX579
Half Duplex GMSK Modem
FX579
1996 Consumer Microcircuits Limited
16
D/579/4
Tx/Rx Switching
(Refer to Figure 8)
Rx to Tx Transition - following a "0" to "1" transition on the TXRXN input:
a)
If DATACLK is at a logic "1" it will go to a logic "0" (t1 max = 1μs), or if at logic "0" will stay low.
It will then remain at "0" for a minimum of 2 bit times, maximum of 3 bit times, before the first
+ve transmit clock edge occurs.
b)
The DATAIO line will go to a high impedance state ready for Tx data to be applied (t2 max =
1μs). Data on the DATAIO line should be set up and ready for when the first +ve transmit clock
edge occurs. This edge will clock the first bit of data into the transmit filter. Succeeding -ve
clock edges may be used by the μController to ensure that data is always set up when +ve
edges occur.
c)
TXOP is opened to the transmit path upon occurrence of the first +ve clock edge. Due to the
delay of the filter, the centre of Bit 1 will appear at the pin a maximum of 2 bit times (BT = 0.5)
or 2.5 bit times (BT = 0.3) later.
d)
At the end of a message the transmit output will remain in the state of the last bit sent.
e)
If a long period of unmodulated carrier is required before a message (approximately 10ms as
on MOBITEX), then the radio's transmitter should be keyed up with the FX579 modem still in
Rx mode.
Tx to Rx Transition - following a "1" to "0" transition on the TXRXN input:
a)
DATACLK continues at the nominal bit rate in a free-running mode until locked to a receive
signal, e.g. after a satisfactory ACQUIRE sequence.
b)
The buffer driving the TXOP pin is immediately connected to V
BIAS
.
c)
The DATAIO line immediately goes low impedance and starts sending Rx data.
d)
There is a 3-bit delay in the receive path before RXIN input data can appear at the DATAIO
pin.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
FX579D4 制造商:CMLMICRO 制造商全稱(chēng):CML Microcircuits 功能描述:HALF DUPLEX GMSK MODEM
FX5800-TD 制造商:Micro-Star International 功能描述:GF FX 5800 128MB 8X AGP - Bulk
FX5-80P-SH 功能描述:CONN HEADER 80POS 1MM R/A GOLD RoHS:否 類(lèi)別:連接器，互連式 >> 板對(duì)板 - 陣列，邊緣類(lèi)型，包廂 系列:FX5 標(biāo)準(zhǔn)包裝:3,000 系列:SlimStack™ 502396 連接器類(lèi)型:插頭，外罩觸點(diǎn) 位置數(shù):100 間距:0.016"（0.40mm） 行數(shù):2 安裝類(lèi)型:表面貼裝 特點(diǎn):固定焊尾 觸點(diǎn)表面涂層:金 觸點(diǎn)涂層厚度:8µin（0.20µm） 包裝:帶卷 (TR) 配接層疊高度:2.5mm 板上方高度:0.084"（2.13mm） 其它名稱(chēng):502396-1010
FX5-80P-SH(71) 功能描述:板對(duì)板與夾層連接器 HDR 80P 1MM R/A GOLD RoHS:否 制造商:JAE Electronics 系列:WP3 產(chǎn)品類(lèi)型:Receptacles 節(jié)距:0.4 mm 疊放高度:1 mm 安裝角: 位置/觸點(diǎn)數(shù)量:50 排數(shù):2 外殼材料:Plastic 觸點(diǎn)材料:Copper Alloy 觸點(diǎn)電鍍:Gold 電壓額定值:50 V 電流額定值:0.4 A
FX5-80P-SH(72) 功能描述:板對(duì)板與夾層連接器 80P R/A SMT HEADER LOC BOSS GLD PLT RoHS:否 制造商:JAE Electronics 系列:WP3 產(chǎn)品類(lèi)型:Receptacles 節(jié)距:0.4 mm 疊放高度:1 mm 安裝角: 位置/觸點(diǎn)數(shù)量:50 排數(shù):2 外殼材料:Plastic 觸點(diǎn)材料:Copper Alloy 觸點(diǎn)電鍍:Gold 電壓額定值:50 V 電流額定值:0.4 A
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