MCIMX35 Motorola Semiconductor Products, MCIMX35 Datasheet - Page 116

• Manufacturer Part Number: MCIMX35
• Manufacturer: Motorola Semiconductor Products

4.7.23.2.14 UART IrDA Mode Receiver
Figure 90
receive timing characteristics.
4.7.24
In order to support four different serial interfaces, the USB serial transceiver can be configured to operate
in one of four modes:
116
1
2
1
2
F
T
(input)
Note: The UART receiver can tolerate 1/(16*F
not exceed 3/(16*F
F
•
•
•
RXD
ref_clk
baud_rate
baud_rate
UA3
UA4
UA5
UA6
MCIMX35 (i.MX35) Multimedia Applications Processor for Automotive Products Advance Information, Rev. 0
ID
ID
DAT_SE0 bidirectional, 3-wire mode
DAT_SE0 unidirectional, 6-wire mode
VP_VM bidirectional, 4-wire mode
: The period of UART reference clock ref_clk ( ipg_perclk after RFDIV divider).
depicts the UART IrDA mode receive timing, with 8 data bit/1 stop bit format.
: 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.
USB Electrical Specifications
Receive Bit Time
Receive IR Pulse Duration
Start
Bit
UA5
Transmit Bit Time in IrDA mode
baud_rate
Transmit IR Pulse Duration
Bit 0
).
Parameter
Parameter
Figure 90. UART IrDA Mode Receive Timing Diagram
1
in IrDA mode
Table 77. IrDA Mode Transmit Timing Parameters
Table 78. IrDA Mode Receive Timing Parameters
Bit 1
Preliminary—Subject to Change Without Notice
Bit 2
baud_rate
UA5
) tolerance in each bit. But accumulation tolerance in one frame must
Bit 3
Symbol
t
Symbol
t
TIRpulse
RIRpulse
t
t
TIRbit
RIRbit
Bit 4
(3/16)*(1/F
1/(16*F
1/F
1/F
UA6
1.41 us
baud_rate
- T
T
Bit 5
baud_rate
Min.
ref_clk
Min.
ref_clk
baud_rate
baud_rate
2
2
1
-
Bit 6
-
)
)
(5/16)*(1/F
1/F
(3/16)*(1/F
1/(16*F
1/F
baud_rate
Bit 7
baud_rate
+ T
Freescale Semiconductor
Max.
UA5
Max.
baud_rate
ref_clk
baud_rate
Table 78
baud_rate
+ T
Possible
Parity
+
ref_clk
Bit
)
UA5
)
)
lists the
Units
Units
STOP
BIT
-
-
-
-