MCIMX31L FREESCALE [Freescale Semiconductor, Inc], MCIMX31L Datasheet - Page 101

• Manufacturer Part Number: MCIMX31L
• Description: Multimedia Applications Processors
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Figure 43
Table 41
4.3.10.1 Half-Rate Clocking Mode
When half-rate clocking is used, the trace data signals are sampled by the TPA on both the rising and falling
edges of TRACECLK, where TRACECLK is half the frequency of the clock shown in
4.3.11
FIR implements asynchronous infrared protocols (FIR, MIR) that are defined by IrDA
Association). Refer to http://www.IrDA.org for details on FIR and MIR protocols.
Freescale Semiconductor
lists the timing parameters.
depicts the setup and hold requirements of the trace data pins with respect to TRACECLK, and
FIR Electrical Specifications
T
T
T
T
ID
ID
T
T
T
cyc
wh
wl
h
r
s
f
Clock period
Low pulse width
High pulse width
Clock and data rise time
Clock and data fall time
Data setup
Data hold
Table 40. ETM TRACECLK Timing Parameters
Table 41. ETM Trace Data Timing Parameters
Figure 42. ETM TRACECLK Timing Diagram
i.MX31/i.MX31L Advance Information, Rev. 1.4
Figure 43. Trace Data Timing Diagram
Parameter
Parameter
Preliminary
dependent
Frequency
Min
Min
2
2
–
–
2
1
Max
Max
–
–
–
3
3
–
–
Electrical Characteristics
®
Figure
(Infrared Data
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
43.
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