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L9374TRLF bảng dữ liệu(PDF) 28 Page - STMicroelectronics

tên linh kiện L9374TRLF
Giải thích chi tiết về linh kiện  Four channel valve driver
PDF  80 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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L9374TRLF bảng dữ liệu(HTML) 28 Page - STMicroelectronics

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Circuit description
L9374LF
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DocID025414 Rev 1
Figure 14. Synchronization controller block diagram
Inputs
The synchronization controller receives the following input signals:
f_A = 4 kHz for internal clocking.
SYNC_TRIG =”1” initiates the synchronization timing with that SPI event.
SPI synchronization values (SYNC_VALUE, RESET_VALUE, STW_V_MIN;
STW_V_MAX) provide the parameters that allow for output synchronization.
Outputs
The synchronization controller provides the following output signals:
The STW signal is used in conjunction with accessing address 0 to notify the master
that the SPI cycles are within the programmed exclusionary window (SYNC_F=1).
The SYNC_SIG initiates the actuation of the new output commands.
The synchronization counter increases its value with every period of f_A. When the value of
the counter equals the SYNC_VALUE a synchronization signal (SYNC_SIG) is generated
(SYNC_SIG=’1’).
The synchronization counter continually counts to the RESET_VALUE and resets unless a
SYNC_TRIG command is sent. If a SYNC_TRIG command is sent then the counter resets
immediately. Upon resetting the SYNC_TRIG and STW signals are reset (SYNC_SIG =
STW =’0’).



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