MCIMX35 Motorola Semiconductor Products, MCIMX35 Datasheet - Page 114

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

4.7.23
This section describes the electrical information of the UART module.
4.7.23.1
4.7.23.1.11 UART Transmitter
Figure 87
Table 75
114
1
2
F
T
(output)
ref_clk
baud_rate
UA1
MCIMX35 (i.MX35) Multimedia Applications Processor for Automotive Products Advance Information, Rev. 0
TXD
ID
: The period of UART reference clock ref_clk ( ipg_perclk after RFDIV divider).
lists the UART RS-232 serial mode transmit timing characteristics.
depicts the transmit timing of UART in RS-232 serial mode, with 8 data bit/1 stop bit format.
: Baud rate frequency. The maximum baud rate the UART can support is ( ipg_perclk frequency)/16.
UART Electrical
Transmit Bit Time
UART RS-232 Serial Mode Timing
Table 74. SSI Receiver with External Clock Timing Parameters (continued)
SS28
SS30
SS32
SS34
SS35
SS36
SS40
SS41
Start
UA1
Bit
ID
Figure 87. UART RS-232 Serial Mode Transmit Timing Diagram
(Rx) CK high to FS (bl) high
(Rx) CK high to FS (bl) low
(Rx) CK high to FS (wl) high
(Rx) CK high to FS (wl) low
(Tx/Rx) External FS rise time
(Tx/Rx) External FS fall time
SRXD setup time before (Rx) CK low
SRXD hold time after (Rx) CK low
Bit 0
Table 75. RS-232 Serial Mode Transmit Timing Parameters
Parameter
Bit 1
Preliminary—Subject to Change Without Notice
Parameter
Bit 2
Bit 3
UA1
Bit 4
Symbol
t
Tbit
Bit 5
1/F
–10.0
–10.0
Bit 6
Min.
10.0
10.0
10.0
2.0
T
baud_rate
—
—
ref_clk
Min.
2
Bit 7
1
-
Max.
15.0
15.0
Possible
6.0
6.0
—
—
—
—
Par Bit
Parity
UA1
Bit
1/F
baud_rate
T
Max.
ref_clk
STOP
Freescale Semiconductor
UA1
BIT
Unit
ns
ns
ns
ns
ns
ns
ns
ns
+
Next
Start
Bit
Units
-