參數資料
型號: MCIMX31DVMN5D
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 532 MHz, MICROPROCESSOR, PBGA473
封裝: 19 X 19 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-473
文件頁數: 110/118頁
文件大小: 1083K
代理商: MCIMX31DVMN5D
Electrical Characteristics
MCIMX31/MCIMX31L Technical Data, Rev. 4.3
Freescale Semiconductor
91
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 75 and Table 57 show the usual timing
requirements for this sequence, with Fckil = CKIL frequency value.
Figure 75. SmartCard Interface Power Down AC Timing
Table 57. Timing Requirements for Power Down Sequence
Num
Description
Symbol
Min
Max
Unit
1
SIM reset to SIM clock stop
Srst2clk
0.9*1/FCKIL
0.8
s
2
SIM reset to SIM TX data low
Srst2dat
1.8*1/FCKIL
1.2
s
3
SIM reset to SIM Voltage Enable Low
Srst2ven
2.7*1/FCKIL
1.8
s
4
SIM Presence Detect to SIM reset Low
Spd2rst
0.9*1/FCKIL
25
ns
SIMPD
RST
CLK
DATA_TX
SVEN
Srst2clk
Srst2dat
Srst2ven
Spd2rst
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