mcimx50 Freescale Semiconductor, Inc, mcimx50 Datasheet - Page 75

• Manufacturer Part Number: mcimx50
• Description: I.mx50 Applications Processors For Consumer Products
• Manufacturer: Freescale Semiconductor, Inc

4.9.3
This section describes the electrical information of the eSDHCv2/v3 and the uSDHC, which includes
SD/eMMC4.3 (Single Data Rate) timing and eMMC4.4 (Dual Date Rate) timing.
4.9.3.1
Figure 36
Freescale Semiconductor
SD1
SD2
SD3
SD4
SD5
ID
Clock Frequency (Low Speed)
Clock Frequency (SD/SDIO Full Speed/High Speed)
Clock Frequency (MMC Full Speed/High Speed)
Clock Frequency (Identification Mode)
Clock Low Time
Clock High Time
Clock Rise Time
Clock Fall Time
output from eSDHCv2 to card
input from card to eSDHCv2
depicts the timing of SD/eMMC4.3, and
Enhanced Secured Digital Host Controller (eSDHCv2/v3) and uSDHC
AC Timing
SD/eMMC4.3 (Single Data Rate) eSDHCv3 and uSDHC AC Timing
i.MX50 Applications Processors for Consumer Products, Rev. 0
Table 51. SD/eMMC4.3 Interface Timing Specification
Parameter
DAT0
......
DAT7
CMD
DAT1
DAT0
......
DAT7
SCK
CMD
DAT1
Figure 36. SD/eMMC4.3 Timing
SD3
Card Input Clock
SD5
SD6
SD2
Table 51
SD4
SD7
lists the SD/eMMC4.3 timing characteristics.
SD8
Symbols
f
f
f
t
t
t
f
t
PP
PP
PP
TLH
THL
WH
OD
WL
1
2
3
SD1
Min
100
—
—
0
0
0
7
7
Electrical Characteristics
25/50
20/52
Max
400
400
—
—
3
3
MHz
MHz
Unit
kHz
kHz
ns
ns
ns
ns
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