2
2
Start
Bit
Data Bits
UARTx_TXD
3
Data Bits
Bit
Start
3
UARTx_RXD
2
3
Stop Bit
Stop Bit
AM3359, AM3358, AM3357, AM3356, AM3354, AM3352
SPRS717H – OCTOBER 2011 – REVISED MAY 2015
7.15 Universal Asynchronous Receiver Transmitter (UART)
For more information, see the Universal Asynchronous Receiver Transmitter (UART) section of the
AM335x Sitara Processors Technical Reference Manual
(
7.15.1 UART Electrical Data and Timing
Table 7-113. Timing Requirements for UARTx Receive
(see
)
NO.
MIN
MAX
UNIT
3
t
w(RX)
Pulse duration, receive start, stop, data bit
0.96U
1.05U
ns
(1) U = UART baud time = 1/programmed baud rate.
Table 7-114. Switching Characteristics for UARTx Transmit
(see
)
NO.
PARAMETER
MIN
MAX
UNIT
1
ƒ
baud(baud)
Maximum programmable baud rate
3.6864
MHz
2
t
w(TX)
Pulse duration, transmit start, stop, data bit
U – 2
U + 2
ns
(1) U = UART baud time = 1 / programmed baud rate
Figure 7-114. UART Timings
Copyright © 2011–2015, Texas Instruments Incorporated
Peripheral Information and Timings
233
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