參數(shù)資料
型號(hào): MCF53012CQT240
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: MICROPROCESSOR, PQFP208
封裝: 28 X 28 MM, ROHS COMPLIANT, LQFP-208
文件頁(yè)數(shù): 40/62頁(yè)
文件大小: 2365K
代理商: MCF53012CQT240
Preliminary Electrical Characteristics
MCF5301x Data Sheet, Rev. 5
Preliminary—Subject to Change Without Notice
Freescale Semiconductor
45
Figure 32. Active-Low-Reset Card Reset Sequence
5.17.3
Power Down Sequence
Power down sequence for SIM interface is as follows:
1.
SIM_PD port detects the removal of the SIM card
2.
SIM_RST goes low
3.
SIM_CLK goes low
4.
SIM_TX goes low
5.
SIM_VEN goes low
Each of these steps is completed in one CKIL period (usually 32 kHz). Power-down may be started in response to a
card-removal detection or launched by the processor. Figure 33 and Table 30 show the usual timing requirements for this
sequence, with Fckil = CKIL frequency value.
Table 30. Timing Requirements for Power Down Sequence
Num
Description
Symbol
Min
Max
Unit
1
SIM reset to SIM clock stop
Srst2clk
0.9
÷ f
CKIL
0.8
s
2
SIM reset to SIM TX data low
Srst2dat
1.8
÷ f
CKIL
1.2
s
3
SIM reset to SIM Voltage Enable Low
Srst2ven
2.7
÷ f
CKIL
1.8
s
4
SIM Presence Detect to SIM reset Low
Spd2rst
0.9
÷ f
CKIL
25
ns
SIM_VEN
SIM_CLK
SIM_RX
2
T0
1
Response
SIM_RST
T1
1
2
< 200 clock cycles
< 40,000 clock cycles
400 clock cycles <
3
400,000 clock cycles <
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