Technical data

MCIMX31C/MCIMX31LC Technical Data, Rev. 4.3
84 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 53. SDHC Interface Timing Parameters
ID Parameter Symbol Min Max Unit
Card Input Clock
SD1 Clock Frequency (Low Speed) f
PP
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) f
PP
2
2
In normal data transfer mode for SD/SDIO card, clock frequency can be any value between 0 MHz–25 MHz.
025MHz
Clock Frequency (MMC Full Speed) f
PP
3
3
In normal data transfer mode for MMC card, clock frequency can be any value between 0 MHz–20 MHz.
020MHz
Clock Frequency (Identification Mode) f
OD
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 t
WL
10 — ns
SD3 Clock High Time t
WH
10 — ns
SD4 Clock Rise Time t
TLH
—10ns
SD5 Clock Fall Time t
THL
—10ns
SDHC output / Card inputs CMD, DAT (Reference to CLK)
SD6 SDHC output delay t
ODL
–6.5 3 ns
SDHC input / Card outputs CMD, DAT (Reference to CLK)
SD7 SDHC input setup t
IS
—18.5ns
SD8 SDHC input hold t
IH
— –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]