參數(shù)資料
型號(hào): MCIMX31_07
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Multimedia Applications Processors
中文描述: 多媒體應(yīng)用處理器
文件頁數(shù): 86/108頁
文件大?。?/td> 1235K
代理商: MCIMX31_07
i.MX31/i.MX31L Advance Information, Rev. 2.3
86
Freescale Semiconductor
Electrical Characteristics
4.3.20.3
Power Down Sequence
Power down sequence for SIM interface is as follows:
1. SIMPD port detects the removal of the SIM Card
2. RST goes Low
3. CLK goes Low
4. TX goes Low
5. VEN goes Low
Each of this steps is done in one CKIL period (usually 32 kHz). Power down can be started because of a
SIM Card removal detection or launched by the processor.
Figure 74
and
Table 54
show the usual timing
requirements for this sequence, with Fckil = CKIL frequency value.
Figure 74. SmartCard Interface Power Down AC Timing
Table 54. Timing Requirements for Power Down Sequence
Num
Description
Symbol
Min
Max
Unit
1
SIM reset to SIM clock stop
S
rst2clk
0.9*1/FCKIL
0.8
μs
2
SIM reset to SIM TX data low
S
rst2dat
1.8*1/FCKIL
1.2
μs
3
SIM reset to SIM Voltage Enable Low
S
rst2ven
2.7*1/FCKIL
1.8
μs
4
SIM Presence Detect to SIM reset Low
S
pd2rst
0.9*1/FCKIL
25
ns
SIMPD
RST
CLK
DATA_TX
SVEN
Srst2clk
Srst2dat
Srst2ven
Spd2rst
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