642Chapter 15 Asynchronous Serial Interface C (UARTC)User’s Manual U16580EE3V1UD0015.6.5 Allowable baud rate range during receptionThe baud rate error range at the destination that is allowable during reception is shown below.Caution: The baud rate error during reception must be set within the allowable error rangeusing the following equation.Figure 15-22: Allowable Baud Rate Range During ReceptionRemark: n = 0 to 2As shown in Figure 15-22, the receive data latch timing is determined by the counter set using theUCnCTL2 register following start bit detection. The transmit data can be normally received if up to thelast data (stop bit) can be received in time for this latch timing.When this is applied to 11-bit reception, the following results in terms of logic.FL = (BR) -1BR: UARTCn baud rate (n = 0, 1)k: UCnCTL2 setting value (n = 0, 1)FL: 1-bit data lengthLatch timing margin: 2 clocksMinimum allowable transfer rate:FL1 data frame (11 FL)×FLminFLmaxUARTCntransfer rate Start bit Bit 0 Bit 1 Bit 7 Parity bitMinimumallowabletransfer rateMaximumallowabletransfer rateStop bitStart bit Bit 0 Bit 1 Bit 7 Parity bitLatch timingStop bitStart bit Bit 0 Bit 1 Bit 7 Parity bit Stop bitFLmin = 11 × FL - × FL = FLk - 2 21k + 22k 2k
