MCIMX31VKN5B Freescale, MCIMX31VKN5B Datasheet - Page 91
MCIMX31VKN5B
Manufacturer Part Number
MCIMX31VKN5B
Description
Manufacturer
Freescale
Datasheet
1.MCIMX31VKN5B.pdf
(122 pages)
Specifications of MCIMX31VKN5B
Operating Temperature (min)
0C
Operating Temperature (max)
70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
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The interface is meant to be used with synchronous SIM cards. This means that the SIM module provides
a clock for the SIM card to use. The frequency of this clock is normally 372 times the data rate on the
TX/RX pins, however SIM module can work with CLK equal to 16 times the data rate on TX/RX pins.
There is no timing relationship between the clock and the data. The clock that the SIM module provides
to the aim card will be used by the SIM card to recover the clock from the data much like a standard UART.
All six (or 5 in case bi-directional TXRX is used) of the pins for each half of the SIM module are
asynchronous to each other.
There are no required timing relationships between the signals in normal mode, but there are some in two
specific cases: reset and power down sequences.
4.3.20.1 General Timing Requirements
Figure 73
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
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.
SIM Clock Frequency (CLK)
SIM CLK Rise Time
SIM CLK Fall Time
SIM Input Transition Time (RX, SIMPD)
shows the timing of the SIM module, and
Cards with Internal Reset
CLK
Description
3
Table 57. SIM Timing Specification—High Drive Strength
2
1
MCIMX31/MCIMX31L Technical Data, Rev. 4.1
Figure 73. SIM Clock Timing Diagram
Sfall
Symbol
S
S
S
S
Figure 57
trans
freq
rise
fall
1/Sfreq
Srise
lists the timing parameters.
0.01
Min
—
—
—
Figure
74):
5 (Some new cards
may reach 10)
Electrical Characteristics
Max
20
20
25
MHz
Unit
ns
ns
ns
91
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