MCIMX31L FREESCALE [Freescale Semiconductor, Inc], MCIMX31L Datasheet - Page 139

• Manufacturer Part Number: MCIMX31L
• Description: Multimedia Applications Processors
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

1
2
3
4.3.20.2 Reset Sequence
4.3.20.2.1
The sequence of reset for this kind of SIM Cards is as follows (see
•
•
•
4.3.20.2.2
The sequence of reset for this kind of card is as follows (see
Freescale Semiconductor
Num
50% duty cycle clock
With C = 50pF
With C = 50pF
1
2
3
4
After powerup, the clock signal is enabled on SGCLK (time T0)
After 200 clock cycles, RX must be high.
The card must send a response on RX acknowledging the reset between 400 and 40000 clock cycles
after T0.
1. After powerup, the clock signal is enabled on CLK (time T0)
2. After 200 clock cycles, RX must be high.
3. RST must remain Low for at least 40000 clock cycles after T0 (no response is to be received on
4. RST is set High (time T1)
SVEN
CLK
RX
RX during those 40000 clock cycles)
SIM Clock Frequency (CLK)
SIM CLK Rise Time
SIM CLK Fall Time
SIM Input Transition Time (RX, SIMPD)
Cards with Internal Reset
Cards with Active Low Reset
T0
1
Description
3
Table 58. SIM Timing Specification—High Drive Strength
2
2
Figure 76. Internal-Reset Card Reset Sequence
1
i.MX31/i.MX31L Advance Information, Rev. 1.4
response
Preliminary
Symbol
S
S
S
S
trans
freq
rise
fall
400 clock cycles <
Figure
0.01
Min
–
–
–
Figure
77):
76):
5 (Some new cards
1
2
may reach 10)
< 200 clock cycles
< 40000 clock cycles
Electrical Characteristics
Max
20
20
25
MHz
Unit
ns
ns
ns
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