參數(shù)資料
型號(hào)： AS5501
廠商： AUSTRIAMICROSYSTEMS AG
元件分類(lèi)： 調(diào)制器/解調(diào)器
英文描述： ER 4C 4#8 SKT RECP BOX
中文描述： 2.4 kbps DATA, MODEM, PDSO28
封裝： SOIC-28
文件頁(yè)數(shù)： 8/26頁(yè)
文件大?。?/td> 315K
代理商： AS5501
comp
-
+
2.5V
VREF
PORN
ResTh
R1
R2
R3
R1=R2=R3=appr.25k
Rhyst=appr.290k
VDD
VSS
VSS
VDD
Ra
Rb
k=Rb / (Ra+Rb)
Off-Delay
porv
Vth = 2*VREF
1+k
with Ra, Rb << R1,R2,R3:
VDD
porv
PORN
300ms
With V(ResTh) defined by external resistors much smaller than R1-3, the POR- threshold can
be set in the range of 2.5V to 5.0V according to the given equation.
1.1.3 TIMING
MCLK: The circuit gets clocked by an 11.0592MHz MASTER CLOCK from external which
is the frequency reference for all RX and TX functions. Since this circuit is working as a
narrow band FSK-modem, the precision of this clock is very critical.
CKSYS: The master-clock divided by 2 is presented at the output CKSYS. In test-mode1 this
pin is used to measure the FSK_ZC signal. In test-mode 2 this pin is used to measure the
PLL-output SC-CLK. In test-mode 3 this pin is used to measure the PLL-output Fmixer.
TxEnI: Transmission gets initialized by setting the input signal TxEn to low. When ZCEN
(zero-crossing TX-sync) is disabled, the internal signal TxEnI is following and setting the
TX-driver active immediately. When ZCEN is enabled, the signal TxEnI is set to low after
the high-going edge of ZC-input after TxEn was forced low.
TxEn
ZC
TxEnI
CKTX
CKR/T
RXD
valid
valid
valid
valid
TXD
receive
transmit
TXD-input gets strobed by CKR/T in TxSyn-mode which can be entered with setting D7 of
the TST-Reg. to H. In default mode (asynchr. TXD) the CKR/T gets synchronised by
TXD-edges with a clock 64 times the baud-rate.
TX-TIMEOUT: There is a timeout-function implemented which sets the device back to
receive-mode (TxEnI=H) after 3 seconds of transmission. This timeout-function can be
disabled by setting the contol-bit MMV by the serial interface. In test-mode 2 and 3 the 3sec
timeout is divided by 256 to 11.7ms to reduce test-time.
AS5501 / AS5502 Multimode Powerline Modem
Data Sheet
Rev A, May 2000
Page 7/25
相關(guān)PDF資料
PDF描述
AS5502 Multimode Powerline-Modem
AS6UA25616 2.3V to 3.6V 256K×16 Intelliwatt low-power CMOS SRAM with one chip enable(2.3V 到 3.6V 256K×16 Intelliwatt 低功耗 CMOS 靜態(tài)RAM（帶單片使能）)
AS6UA25616-BC 2.3V to 3.6V 256K】16 Intelliwatt⑩ low-power CMOS SRAM with one chip enable
AS6UA25616-BI 2.3V to 3.6V 256K】16 Intelliwatt⑩ low-power CMOS SRAM with one chip enable
AS6UA25616-TC 2.3V to 3.6V 256K】16 Intelliwatt⑩ low-power CMOS SRAM with one chip enable
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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AS550R0JLF 功能描述:線繞電阻器 - 透孔 50 OHM 5% 5W RoHS:否 制造商:Bourns 電阻:10 Ohms 容差:5 % 功率額定值:7 W 溫度系數(shù):200 PPM / C 系列:FW 端接類(lèi)型:Axial 工作溫度范圍:- 55 C to + 155 C 尺寸:9.5 mm Dia. x 26 mm L 封裝:Ammo 產(chǎn)品:Power Resistors Wirewound High Energy
AS5510 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:Linear Hall Sensor with IC Output
AS5510 AB 制造商:ams 功能描述:Adapter Board
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