參數(shù)資料
型號： ST7538
廠商： 意法半導體
英文描述： POWER LINE FSK TRANSCEIVER
中文描述： 電力線FSK收發(fā)器
文件頁數(shù)： 12/30頁
文件大?。?/td> 264K
代理商： ST7538
ST7538
12/30
–
Synchronous mode.
St7538 allows to interface the host Controller using a four lines synchronous interface (RXD,TXD, CLR/T
&
RxTx
). ST7538 is always the master of the communication and provides the clock reference on CLR/T
line.
When ST7538 is in receiving mode an internal PLL recovers the clock reference. Data on RxD line are
stable on CLR/T rising Edge.
When ST7538 is in transmitting mode the clock reference is internally generated and data are read on TxD
line on CLR/T rising Edge.
If
RxTx
line is set to “1” & REG_DATA=”0” (Data Reception), ST7538 enters in an Idle State and CLR/T
line is forced Low. After Tcc time the modem starts providing received data on RxD line.
If
RxTx
line is set to “0” & REG_DATA=”0” (Data Transmission), ST7538 d in an Idle State and transmission
circuitry is switched on. (figure 3). After Tcc time the modem starts transmitting data present on TXD line
(figure 3) .
Figure 2.
Figure 3. Data Reception -> Data Transmission -> Data reception
PACKET MODE (Only for Reception)
In Packet mode data transmission from ST7538 to Host Controller is done at a higher speed than the
Mains one. This function could reduce the efficiency of data exchange process because the Host Control-
ler is involved in data reception for a shorter period of time.
To achieve this function is enabled an internal auxiliary buffer which stores the incoming bits. The buffer
is transferred to the host controller when full at the packet rate. The packet rate is programmable and is
related to the Mclk clock frequency. The length of the packet can be also programmed through the control
register (see table 9) to be 16, 14, 9 or 8 bits.
The packet mode to start working needs two levels of enable. One at the control register level the other at
the pin level. TxD is the pin that if forced High enables the Packet Mode Function. According to when TxD
is forced high, the next incoming bit is stored inside the internal buffer or delivered on RxD pin. If TxD pin
is forced low during a RX session the transceiver starts working in bit mode and the content of the packet
buffer is deleted.
Transmitting Bit Synchronization
CLR/T
RxD
CLR/T
TxD
Receiving Bit Synchronization
T
S
T
H
D03IN1416
T
CC
T
DS
T
CR
T
CR
T
DH
T
S
T
H
T
B
T
CC
CLR_T
RXD
RxTx
TXD
REG_DATA
D03IN1402
BIT23
BIT22
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相關代理商/技術參數(shù)
參數(shù)描述
ST7538P 功能描述:電信線路管理 IC 1/2 Duplex FSK Modem RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
ST7538P013TR 功能描述:電信集成電路 1/2 Duplex FSK Modem RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray
ST7538Q 功能描述:電信線路管理 IC FSK power line transceiver RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
ST7538QTR 功能描述:電信線路管理 IC FSK power line transceiver RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
ST7540 功能描述:電信線路管理 IC FSK powerline transceiver RoHS:否 制造商:STMicroelectronics 產品:PHY 接口類型:UART 電源電壓-最大:18 V 電源電壓-最小:8 V 電源電流:30 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
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