ADE5166 datasheet(131/148 Pages) AD

131 / 148 page

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.

ADE5166 数据表(PDF) 131 Page - Analog Devices