MCIMX355AVM5B Freescale, MCIMX355AVM5B Datasheet - Page 123
MCIMX355AVM5B
Manufacturer Part Number
MCIMX355AVM5B
Description
Manufacturer
Freescale
Datasheet
1.MCIMX355AVM5B.pdf
(148 pages)
Specifications of MCIMX355AVM5B
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
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1
2
4.9.23.1.12 UART Receiver
Figure 98
serial mode receive timing characteristics.
1
2
4.9.23.2
The following subsections give the UART transmit and receive timings in IrDA mode.
4.9.23.2.13 UART IrDA Mode Transmitter
Figure 99
the transmit timing characteristics.
Freescale Semiconductor
F
T
The UART receiver can tolerate 1/(16 × F
exceed 3/(16 × F
F
(output)
ref_clk
baud_rate
baud_rate
UA1
UA2
TXD
ID
(input)
ID
RXD
: The period of UART reference clock ref_clk ( ipg_perclk after RFDIV divider).
: Baud rate frequency. The maximum baud rate the UART can support is ( ipg_perclk frequency)/16.
: Baud rate frequency. The maximum baud rate the UART can support is ( ipg_perclk frequency) ÷ 16.
depicts the RS-232 serial mode receive timing, with 8 data bit/1 stop bit format.
depicts the UART IrDA mode transmit timing, with 8 data bit/1 stop bit format.
Transmit Bit Time
UART IrDA Mode Timing
Start
Bit
baud_rate
Start
UA2
Bit
UA3
Figure 98. UART RS-232 Serial Mode Receive Timing Diagram
Bit 0
Receive Bit Time
).
Bit 0
Table 79. RS-232 Serial Mode Transmit Timing Parameters
Table 80. RS-232 Serial Mode Receive Timing Parameters
i.MX35 Applications Processors for Automotive Products, Rev. 9
Parameter
Parameter
Figure 99. UART IrDA Mode Transmit Timing Diagram
Bit 1
Bit 1
baud_rate
1
Bit 2
Bit 2
UA3
) tolerance in each bit. But accumulation tolerance in one frame must not
UA2
Bit 3
Bit 3
Bit 4
Symbol
Symbol
t
t
Rbit
Tbit
Bit 4
Bit 5
1/(16 × F
1/F
1/F
Bit 6
UA4
baud_rate
baud_rate
T
Bit 5
ref_clk
Min.
Min.
baud_rate
2
Bit 7
1
2
–
–
Bit 6
)
Possible
Par Bit
Parity
UA2
1/(16 × F
Bit
1/F
1/F
Bit 7
baud_rate
baud_rate
T
STOP
Max.
Max.
ref_clk
UA2
BIT
UA3
baud_rate
Possible
+
Parity
+
Table 81
Table 80
Bit
Next
Start
Bit
)
UA3
Units
Units
STOP
—
—
BIT
lists
lists
123
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