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i.MX RT1050 UART Baud Rate Clarification

Question asked by aaronledger on Jun 12, 2018
Latest reply on Jun 27, 2018 by igorpadykov

In page 11 of the i.MX RT1050 datasheet, UART  module is summarized as having "Programmable baud rates up to 5 Mbps." With further research into the clock tree and reference manual, it seems that the baud rate could be as high as 20 Mbps as follows:

 

PLL3 (pll3_sw_clk) = 480 MHz / 6 = 80 MHz = UART_CLK_ROOT which feeds the BAUD Divider.

 

Baud rate = baud clock /( (OSR+1) x SBR)

Max. Baud Rate: OSR = 3 (4x Oversampling) and SBR = 1 => 80 MHz / ((3+1) x 1) = 20 Mbps

 

Is there something incorrect about the above calculation and assumptions or is the statement about 5 Mbps incorrect?

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