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ADE5569 bảng dữ liệu(PDF) 131 Page - Analog Devices

tên linh kiện ADE5569
Giải thích chi tiết về linh kiện  Single-Phase Energy Measurement IC with 8052 MCU, RTC, and LCD Driver
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ADE5569 bảng dữ liệu(HTML) 131 Page - Analog Devices

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Preliminary Technical Data
ADE5166/ADE5169/ADE5566/ADE5569
Rev. PrB | Page 131 of 148
For example, to get a baud rate of 9600 while operating at a core
clock frequency of 4.096 MHz, with the PLL CD bits equal to 0,
DIV2 + SBTH2 = log(4,096,000/(16 × 9600))/log2 =
4.74 = 4
Note that the DIV result is rounded down.
SBAUDF2 = 64 × (4,096,000/(16 × 23 × 9600) − 1) =
42.67 = 0x2B
Therefore, the actual baud rate is 9570 bps, which gives an error
of 0.31%.
UART ADDITIONAL FEATURES
Enhanced Error Checking
The extended UART2 provides frame error, break error and
overwrite error detection. Framing errors occur when a stop bit
is not present at the end of the frame. A missing stop bit implies
that the data in the frame may not have been received properly.
Break error detection indicates if the Rx line has been low for
longer than a 9-bit frame. It indicates that the data just received,
a zero, or NULL character, is not valid because the master has
disconnected. Overwrite error detection indicates if the
received data isn’t read fast enough and as result, a byte of data
has been lost.
UART2 TxD2 signal modulation
There is an internal 38 kHz signal that can be read with the
UART2 transmit signal for use in remote control applications.



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