shows the UART timing.
_
_
Figure 8-10. UART Timing Diagram
lists the UART timing characteristics.
Table 8-5. UART Timing Characteristics
PARAMETER
CONDITION
MIN
TYP
MAX UNIT
Baud rate
37.5
4364
Kbps
Baud rate accuracy per byte
Receive-transmit
–2.5%
1.5%
Baud rate accuracy per bit
Receive-transmit
–12.5%
12.5%
t3
CTS low to TX_DATA on
0.0
2.0
µs
t4
CTS high to TX_DATA off
Hardware flow control
1.0
bytes
t6
CTS high pulse duration
1.0
Bit
t1
RTS low to RX_DATA on
0.0
2.0
µs
t2
RTS high to RX_DATA off
Interrupt set to 1/4 FIFO
16.0
bytes
STR-Start-bit;
D0..Dn - Data bits (LSB first);
PAR - Parity bit (if used);
STP - Stop-bit
TX
STR
D0
D1
D2
Dn
PAR
STP
tb
Figure 8-11. UART Data Frame
WL1801MOD, WL1805MOD, WL1831MOD, WL1835MOD
SWRS152N – JUNE 2013 – REVISED APRIL 2021
24
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