Table 6-76 Switching Characteristics Over Recommended Operating Conditions for UARTx Transmit(1)
(see Figure 6-47)
NO. |
PARAMETER |
MIN |
MAX |
UNIT |
1 |
f(baud) |
Maximum programmable baud rate(2) |
|
D/E(3)(4) |
MBaud |
2 |
tw(UTXDB) |
Pulse duration, transmit data bit (TXDn) |
U - 2 |
U + 2 |
ns |
3 |
tw(UTXSB) |
Pulse duration, transmit start bit |
U - 2 |
U + 2 |
ns |
(1) U = UART baud time = 1/programmed baud rate.
(2) Baud rate is not indicative of data rate. Actual data rate will be limited by system factors such as EDMA loading, EMIF loading, system frequency, etc.
(3) D = UART input clock in MHz. The UART(s) input clock source is PLL0_SYSCLK2.
(4) E = UART divisor x UART sampling rate. The UART divisor is set through the UART divisor latch registers (DLL and DLH). The UART sampling rate is set through the over-sampling mode select bit (OSM_SEL) of the UART mode definition register (MDR).
Figure 6-47 UART Transmit/Receive Timing