
MCIMX31/MCIMX31L Technical Data, Rev. 4.3
88
Freescale Semiconductor
Electrical Characteristics
Figure 71. SDHC Timing Diagram
4.3.20
SIM Electrical Specifications
Each SIM card interface consist of a total of 12 pins (for 2 separate ports of 6 pins each. Mostly one port
with 5 pins is used).
Table 55. SDHC Interface Timing Parameters
ID
Parameter
Symbol
Min
Max
Unit
Card Input Clock
SD1
Clock Frequency (Low Speed)
fPP
1
1 In low speed mode, card clock must be lower than 400 kHz, voltage ranges from 2.7 V–3.3 V.
0
400
kHz
Clock Frequency (SD/SDIO Full Speed)
fPP
2
2 In normal data transfer mode for SD/SDIO card, clock frequency can be any value between 0 MHz–25 MHz.
025
MHz
Clock Frequency (MMC Full Speed)
fPP
3
3 In normal data transfer mode for MMC card, clock frequency can be any value between 0 MHz–20 MHz.
020
MHz
Clock Frequency (Identification Mode)
fOD
4
4 In card identification mode, card clock must be 100 kHz–400 kHz, voltage ranges from 2.7 V–3.3 V.
100
400
kHz
SD2
Clock Low Time
tWL
10
—
ns
SD3
Clock High Time
tWH
10
—
ns
SD4
Clock Rise Time
tTLH
—10
ns
SD5
Clock Fall Time
tTHL
—10
ns
SDHC Output/Card Inputs CMD, DAT (Reference to CLK)
SD6
SDHC output delay
tODL
–6.5
3
ns
SDHC Input/Card Outputs CMD, DAT (Reference to CLK)
SD7
SDHC input setup
tIS
—18.5
ns
SD8
SDHC input hold
tIH
—
–11.5
ns
SD1
SD5
SD7
SD4
SD8
CMD
Output from SDHC to card
DATA[3:0]
Input to SDHC
CLK
SD2
SD6
SD3
CMD
DATA[3:0]