參數(shù)資料
型號: MCF54417CMJ250
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: MICROPROCESSOR, PBGA256
封裝: 12 X 12 MM, ROHS COMPLAINT, MAPBGA-256
文件頁數(shù): 33/60頁
文件大小: 1107K
代理商: MCF54417CMJ250
Electrical characteristics
MCF5441x ColdFire Microprocessor Data Sheet, Rev. 6
Preliminary—Subject to Change Without Notice
Freescale Semiconductor
39
4.16.1
General timing requirements
Figure 21 shows the timing of the SIM module, and Table 22 lists the timing parameters.
Figure 21. SIM clock timing diagram
4.16.2
Reset sequence
4.16.2.1
Cards with internal reset
The reset sequence for this kind of SIM card is as follows (see Figure 22):
After powerup, the clock signal is enabled on SIM_CLK (time T0)
After 200 clock cycles, RX must be high.
The card must send a response on RX acknowledging the reset between 400 and 40,000 clock cycles after T0.
Figure 22. Internal-reset card reset sequence
Table 22. SIM timing specification—High Drive strength
Num
Description
Symbol
Min
Max
Unit
1
SIM clock frequency (SIM_CLK)1
1 50% duty cycle clock
Sfreq
0.01
5 (Some new cards
may reach 10)
MHz
2
SIM_CLK rise time 2
2 With C = 50pF
Srise
–20
ns
3
SIM_CLK fall time 3
3 With C = 50pF
Sfall
–20
ns
4
SIM input transition time (RX, SIM_PD)
Strans
–25
ns
SIM_CLK
Srise
Sfall
1/Sfreq
SIM_VEN
SIM_CLK
SIM_RX
2
T0
1
Response
2
1
< 200 clock cycles
< 40,000 clock cycles
400 clock cycles <
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相關代理商/技術參數(shù)
參數(shù)描述
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