參數(shù)資料
型號(hào)： ST7538P
廠(chǎng)商： 意法半導(dǎo)體
英文描述： POWER LINE FSK TRANSCEIVER
中文描述： 電力線(xiàn)FSK收發(fā)器
文件頁(yè)數(shù)： 24/30頁(yè)
文件大?。?/td> 264K
代理商： ST7538P
ST7538
24/30
AUXILIARY ANALOG AND DIGITAL FUNCTIONS
Band In Use
The Band in Use Block has a Carrier Detection like function but with a different Input Sensibility (77dB
μ
V
Typ.)
and with a different BandPass filter Selectivity (40dB/Dec).
BU line is forced High when a signal in band is detected.
To prevent BU line false transition, BU signal is conditioned to Carrier Detection Internal Signal.
Time Out
Time Out Function is a protection against a too long data transmission. When Time Out function is enabled
after 1 or 3 second of continuos transmission the transceiver is forced in receiving mode. This function
allows ST7538 to automatically manage the CENELEC Medium Access specification. When a time-out
event occur, TOUT is forced high, and is held high for at least 125 ms. To Unlock the Time Out condition
RxTx
should be forced High. During the time out period only register access or reception mode are en-
abled.
During Reset sequence if
RxTx
line =”0” & REG_DATA line =”1”, TIMEOUT protection is suddendly en-
abled and ST7538 must be configured in data reception after the reset event before starting a new data
transmission.
Time Out time is programmable using Control Register bits 7 and 8 (table 6).
Figure 17. Time-out Timing and Unlock Sequence
Reset & Watchdog
RSTO Output is a reset generator for the application circuitry. During the ST7538 startup sequence is
forced low. RSTO becomes high after a T
RSTO
delay from the end of oscillator startup sequence.
Inside ST7538 is also embedded a watchdog function. The watchdog function is used to detect the occur-
rence of a software fault of the Host Controller. The watchdog circuitry generates an internal and external
reset (RSTO low for T
RSTO
time) on expiry of the internal watchdog timer. The watchdog timer reset can
be achieved applying a negative pulse on WD pin Fig 18.
Figure 18. Reset and Watchdog Timing
T
OUT
T
OFF
T
OFFD
RxTx
TOUT
D03IN1409
T
WO
T
RSTO
T
WD
T
WM
T
RSTO
RSTO
WD
D03IN1410
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST7538P013TR 功能描述:電信集成電路 1/2 Duplex FSK Modem RoHS:否 制造商:STMicroelectronics 類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray
ST7538Q 功能描述:電信線(xiàn)路管理 IC FSK power line transceiver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
ST7538QTR 功能描述:電信線(xiàn)路管理 IC FSK power line transceiver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
ST7540 功能描述:電信線(xiàn)路管理 IC FSK powerline transceiver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
ST7540TR 功能描述:電信線(xiàn)路管理 IC FSK powerline transceiver RoHS:否 制造商:STMicroelectronics 產(chǎn)品:PHY 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:VFQFPN-48 封裝:Tray
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