Baud Rate Calculation; Figure 59. Uart Divider Flow Chart; Figure 60. Uart Initial Setting Flow Chart - Wiznet W7500 Reference Manual

22.3.1

Baud rate calculation

UARTx can operate with or without using the Fractional Divider. The baud rate divisor is a
22-bit number consisting the UARTxIBRD(16-bit integer) and the UARTxFBRD(6-bit fractional).
This is used by the baud rate generator to determine the bit period.
Baud Rate Divisor =
-
Figure 60 show how to set the UART Initial value.
W7500 Datasheet Version1.0.0
UARTCLK
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(16∗�������� ��������)
Calculating UART
baudrate (BR)
PCLK,
BR
DL = PCLK/(16 *BR)
UARTxIBRD = Dlinteger
UARTxFBRD = ((DL – DL
float
END

Figure 59. UART divider flow chart

Initia l setting Start
Setting UART baudra te
Set UARTxLCR_H
(Word length/Stop bit/Parity)
Set UARTxCR
(Mode/Hardwa reFlowControl)
END

Figure 60. UART Initial setting flow chart

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integer
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