參數(shù)資料
型號： ST901
廠商： 意法半導體
英文描述： HIGH VOLTAGE IGNITION COIL DRIVER NPN POWER DARLINGTON
中文描述： 高壓點火線圈驅動達林頓NPN電源
文件頁數(shù)： 152/199頁
文件大?。?/td> 2813K
代理商： ST901
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁當前第152頁第153頁第154頁第155頁第156頁第157頁第158頁第159頁第160頁第161頁第162頁第163頁第164頁第165頁第166頁第167頁第168頁第169頁第170頁第171頁第172頁第173頁第174頁第175頁第176頁第177頁第178頁第179頁第180頁第181頁第182頁第183頁第184頁第185頁第186頁第187頁第188頁第189頁第190頁第191頁第192頁第193頁第194頁第195頁第196頁第197頁第198頁第199頁
152/199
ST90158 - MULTIPROTOCOL SERIAL COMMUNICATIONS INTERFACE (SCI-M)
MULTIPROTOCOL SERIAL COMMUNICATIONS INTERFACE
(Cont’d)
9.6.6 Clocks And Serial Transmission Rates
The communication bit rate of the SCI transmitter
and receiver sections can be provided from the in-
ternal Baud Rate Generator or from external
sources. The bit rate clock is divided by 16 in
Asynchronous mode (CD in CCR reset), or undi-
vided in the 3 other modes (CD set).
With INTCLK running at 24MHz and no external
Clock provided, a maximum bit rate of 3MBaud
and 750KBaud is available in undivided and divide
by-16-mode respectively.
With INTCLK running at 24MHz and an external
Clock provided through the RXCLK/TXCLK lines,
a maximum bit rate of 3MBaud and 375KBaud is
avaiable in undivided and divided by 16 mode re-
spectively (see Figure 10 "Receiver and Transmit-
ter Clock Frequencies")"
External Clock Sources.
The External Clock in-
put pin TXCLK may be programmed by the XTCLK
and OCLK bits in the CCR register as: the transmit
clock input, Baud Rate Generator output (allowing
an external divider circuit to provide the receive
clock for split rate transmit and receive), or as
CLKOUT output in Synchronous and Serial Ex-
pansion modes. The RXCLK Receive clock input
is enabled by the XRX bit, this input should be set
in accordance with the setting of the CD bit.
Baud Rate Generator.
The internal Baud Rate
Generator consists of a 16-bit programmable di-
vide by “N” counter which can be used to generate
the transmitter and/or receiver clocks. The mini-
mum baud rate divisor is 2 and the maximum divi-
sor is 2
16
-1. After initialising the baud rate genera-
tor, the divisor value is immediately loaded into the
counter. This prevents potentially long random
counts on the initial load.
The Baud Rate generator frequency is equal to the
Input Clock frequency divided by the Divisor value.
WARNING:
Programming the baud rate divider to
0 or 1 will stop the divider.
The output of the Baud Rate generator has a pre-
cise 50% duty cycle. The Baud Rate generator can
use INTCLK for the input clock source. In this
case, INTCLK (and therefore the MCU Xtal)
should be chosen to provide a suitable frequency
for division by the Baud Rate Generator to give the
required transmit and receive bit rates. Suitable
INTCLK frequencies and the respective divider
values for standard Baud rates are shown in
Table
28
.
9.6.7 SCI -M Initialization Procedure
Writing to either of the two Baud Rate Generator
Registers immediately disables and resets the SCI
baud rate generator, as well as the transmitter and
receiver circuitry.
After writing to the second Baud Rate Generator
Register, the transmitter and receiver circuits are
enabled. The Baud Rate Generator will load the
new value and start counting.
To initialize the SCI, the user should first initialize
the most significant byte of the Baud Rate Gener-
ator Register; this will reset all SCI circuitry. The
user should then initialize all other SCI registers
(SICR/SOCR included) for the desired operating
mode and then, to enable the SCI, he should ini-
tialize the least significant byte Baud Rate Gener-
ator Register.
'On-the-Fly' modifications of the control registers'
content during transmitter/receiver operations, al-
though possible, can corrupt data and produce un-
desirable spikes on the I/O lines (data, clock and
control). Furthermore, modifying the control regis-
ters' content without reinitialising the SCI circuitry
(during stand-by cycles, waiting to transmit or re-
ceive data) must be kept carefully under control by
software to avoid spurious data being transmitted
or received.
Note
: For synchronous receive operation, the data
and receive clock must not exhibit significant skew
between clock and data. The received data and
clock are internally synchronized to INTCLK.
Figure 84. SCI-M Baud Rate Generator Initialization Sequence
SELECT SCI
WORKING MODE
LEAST SIGNIFICANT
BYTE INITIALIZATION
MOST SIGNIFICANT
BYTE INITIALIZATION
9
相關PDF資料
PDF描述
ST901T HIGH VOLTAGE IGNITION COIL DRIVER NPN POWER DARLINGTON
ST9291J7B1 Microcontroller
ST9291N2B1 Microcontroller
ST9291N3B1 Microcontroller
ST9291N4B1 Microcontroller
相關代理商/技術參數(shù)
參數(shù)描述
ST9011 制造商:SEMTECH_ELEC 制造商全稱:SEMTECH ELECTRONICS LTD. 功能描述:NPN Silicon Epitaxial Planar Transistor
ST9012 制造商:SEMTECH_ELEC 制造商全稱:SEMTECH ELECTRONICS LTD. 功能描述:PNP Silicon Epitaxial Planar Transistor
ST90-125L2KI 功能描述:CAP TANT 90UF 125V 10% AXIAL RoHS:否 類別:電容器 >> 鉭 系列:SuperTan® ST 標準包裝:1,000 系列:TANTAMOUNT® 695D 電容:3.3µF 電壓 - 額定:50V 容差:±20% ESR（等效串聯(lián)電阻）:3.2 歐姆 類型:保形涂層 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:2414（6034 公制） 尺寸/尺寸:0.236" L x 0.135" W（6.00mm x 3.43mm） 高度 - 座高（最大）:0.085"（2.16mm） 引線間隔:- 制造商尺寸代碼:F 特點:通用 包裝:帶卷 (TR) 壽命@溫度:-
ST9013 制造商:SEMTECH_ELEC 制造商全稱:SEMTECH ELECTRONICS LTD. 功能描述:NPN Silicon Epitaxial Planar Transistor
ST90135 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8/16-BIT MCU FAMILY WITH UP TO 64K ROM/OTP/EPROM AND UP TO 2K RAM
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*