參數(shù)資料
型號: MCIMX31
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Multimedia Applications Processors
中文描述: 多媒體應用處理器
文件頁數(shù): 101/170頁
文件大?。?/td> 1562K
代理商: MCIMX31
Electrical Characteristics
i.MX31/i.MX31L Advance Information, Rev. 1.4
Freescale Semiconductor
101
Preliminary
Figure 42. ETM TRACECLK Timing Diagram
Figure 43
depicts the setup and hold requirements of the trace data pins with respect to TRACECLK, and
Table 41
lists the timing parameters.
Figure 43. Trace Data Timing Diagram
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
Figure 43
.
4.3.11
FIR implements asynchronous infrared protocols (FIR, MIR) that are defined by IrDA
(Infrared Data
Association). Refer to http://www.IrDA.org for details on FIR and MIR protocols.
FIR Electrical Specifications
Table 40. ETM TRACECLK Timing Parameters
ID
Parameter
Min
Max
Unit
T
cyc
Clock period
Frequency
dependent
ns
T
wl
Low pulse width
2
ns
T
wh
High pulse width
2
ns
T
r
Clock and data rise time
3
ns
T
f
Clock and data fall time
3
ns
Table 41. ETM Trace Data Timing Parameters
ID
Parameter
Min
Max
Unit
T
s
Data setup
2
ns
T
h
Data hold
1
ns
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