MCIMX287CVM4B Freescale, MCIMX287CVM4B Datasheet - Page 54

• Manufacturer Part Number: MCIMX287CVM4B
• Manufacturer: Freescale

Specifications of MCIMX287CVM4B

• Lead Free Status / RoHS Status: Compliant

1
2
3
4
3.4.14.2
Figure 37
that only DATA0–DATA7 are sampled on both edges of the clock (not applicable to CMD).
54
Card Input Clock
SSP Output / Card Inputs CMD, DAT (Reference to CLK)
SSP Input / Card Outputs CMD, DAT (Reference to CLK)
In low speed mode, the card clock must be lower than 400 kHz, and the voltage ranges from 2.7 to 3.6 V.
In normal speed mode for the SD/SDIO card, clock frequency can be any value between 0 ~ 25 MHz. In high speed mode,
clock frequency can be any value between 0 ~ 50 MHz.
In normal speed mode for MMC card, clock frequency can be any value between 0 ~ 20 MHz. In high speed mode, clock
frequency can be any value between 0 ~ 52MHz.
To satisfy hold timing, the delay difference between clock input and cmd/data input must not exceed 2ns.
SD7
SD8
SD1
SD2
SD3
SD4
ID
ID
SSP Input Setup Time
SSP Input Hold Time
Clock Frequency (MMC Full Speed/High Speed)
SSP Output Delay
SSP Input Setup Time
SSP Input Hold Time
output from SSP to card
depicts the timing of MMC4.4, and
input from card to SSP
MMC4.4 (Dual Data Rate) AC Timing
i.MX28 Applications Processor Data Sheet for Consumer Products, Rev. 0
Table 57. SD/MMC4.3 Interface Timing Specification (continued)
Parameter
Parameter
Table 58. MMC4.4 Interface Timing Specification
DAT0
......
DAT7
DAT1
DAT0
......
DAT7
SCK
DAT1
Figure 37. MMC4.4 Timing
Table 58
SD2
lists the MMC4.4 timing characteristics. Be aware
Symbols
SD3
Symbols
t
t
t
t
f
ISU
ISU
t
IH
OD
PP
IH
4
SD4
SD2
SD1
Min
Min
2.5
2.5
2.5
2.5
–5
0
Freescale Semiconductor
Max
Max
52
—
—
—
—
5
......
......
Unit
Unit
MHz
ns
ns
ns
ns
ns