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SPEAR320S Datenblatt(PDF) 105 Page - STMicroelectronics

Teilenummer SPEAR320S
Bauteilbeschribung  Embedded MPU with ARM926 core for industrial and consumer applications
PDF  113 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
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SPEAR320S Datenblatt(HTML) 105 Page - STMicroelectronics

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SPEAr320S
Timing requirements
Doc ID 022508 Rev 2
105/113
Note:
1
The time value depends upon the CPU frequency to write and read registers.
2
It also depends on the UART clock frequency used to set its flag register bit to indicate the
end of transmission.
For example:
For tD2, the above values are with respect to 83 MHz PCLK and UARTCLK 83 MHz.
Table 81.
RS485_OE transmit and receive timing characteristics
Symbol
Parameters
Min
Max
Unit
tD1
Delay from OE enable till UART first bit
transmission
500
ns
tD2
Delay from UART last bit transmission till OE
enable
900
ns



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