MCIMX31L FREESCALE [Freescale Semiconductor, Inc], MCIMX31L Datasheet - Page 140

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

Electrical Characteristics
4.3.20.3 Power Down Sequence
Power down sequence for SIM interface is as follows:
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.
requirements for this sequence, with Fckil = CKIL frequency value.
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5. RST must remain High for at least 40000 clock cycles after T1 and a response must be received
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
SVEN
RST
CLK
RX
on RX between 400 and 40000 clock cycles after T1.
T0
1
Figure 77. Active-Low-Reset Card Reset Sequence
i.MX31/i.MX31L Advance Information, Rev. 1.4
3
Preliminary
T1
400000 clock cycles <
400 clock cycles <
Figure 78
2
and
Table 59
3
1
2
3
< 200 clock cycles
< 40000 clock cycles
response
show the usual timing
Freescale Semiconductor