Datasheet

Data Sheet ADE5166/ADE5169/ADE5566/ADE5569
Rev. D | Page 139 of 156
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
(POWCON[2:0]) 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 × 2
3
× 9600) − 1) =
42.67 = 0x2B
Therefore, the actual baud rate is 9570 bps, which gives an error
of 0.31%.
UART2 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 whether the RxD2 line is low for
longer than a 9-bit frame. It indicates that the data just received,
a 0 or NULL character, is not valid because the master has discon-
nected. Overwrite error detection indicates whether the received
data is not read fast enough and, as result, a byte of data is lost.