Freescale Semiconductor Evaluation Kit (EVK) for the i.MX51 Applications Processor MCIMX51EXP MCIMX51EXP Datenbogen

Produktcode

MCIMX51EXP

i.MX51 Applications Processors for Consumer and Industrial Products, Rev. 6

130

Freescale Semiconductor

Electrical Characteristics

Each of these 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 87

and

Table 98

shows the usual

timing requirements for this sequence, with Fckil = CKIL frequency value.

Figure 87. SmartCard Interface Power Down AC Timing

Table 98. Timing Requirements for Power Down Sequence

Parameter

Symbol

Min

Max

Unit

SI7

SIM reset to SIM clock stop

rst2clk

0.9

1/Fckil

1.1

1/Fckil

SI8

SIM reset to SIM TX data low

rst2dat

1.8

1/Fckil

2.2

1/Fckil

SI9

SIM reset to SIM voltage enable low

rst2ven

2.7

1/Fckil

3.3

1/Fckil

SI10

SIM presence detect to SIM reset low

pd2rst

0.9

1/Fckil

1.1

1/Fckil

SIMx_SIMPDy

SIMx_RSTy

SIMx_CLKy

SIMx_DATAy_RX_TX

SIMx_SVENy

SI7

SI8

SI9

SI10