OMAP-L137 Low-Power Applications Processor
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SPRS563A–SEPTEMBER 2008–REVISED OCTOBER 2008
6.25.2 UART Electrical Data/Timing
Table 6-87. Timing Requirements for UARTx Receive(1) (see Figure 6-64)
NO.
UNIT
MIN
0.96U
0.96U
MAX
1.05U
1.05U
4
5
tw(URXDB)
tw(URXSB)
Pulse duration, receive data bit (RXDn)
Pulse duration, receive start bit
ns
ns
(1) U = UART baud time = 1/programmed baud rate.
Table 6-88. Switching Characteristics Over Recommended Operating Conditions for UARTx Transmit(1)
(see Figure 6-64)
NO.
PARAMETER
UNIT
MIN
MAX
1
2
3
f(baud)
Maximum programmable baud rate
Pulse duration, transmit data bit (TXDn)
Pulse duration, transmit start bit
3
MBaud
ns
tw(UTXDB)
tw(UTXSB)
U - 2
U - 2
U + 2
U + 2
ns
(1) U = UART baud time = 1/programmed baud rate.
3
2
Start
Bit
UART_TXDn
Data Bits
5
4
Start
Bit
UART_RXDn
Data Bits
Figure 6-64. UART Transmit/Receive Timing
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Peripheral Information and Electrical Specifications
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