參數(shù)資料
型號(hào): MCIMX281AVM4B
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 454 MHz, RISC PROCESSOR, PBGA289
封裝: 14 X 14 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-289
文件頁(yè)數(shù): 49/72頁(yè)
文件大?。?/td> 915K
代理商: MCIMX281AVM4B
i.MX28 Applications Processors Data Sheet for Automotive Products, Rev. 1
Freescale Semiconductor
53
3.5.14
Synchronous Serial Port (SSP) AC Timing
This section describes the electrical information of the SSP, which includes SD/MMC4.3 (Single Data
Rate) timing, MMC4.4 (Dual Date Rate) timing, MS (Memory Stick) timing, and SPI timing.
3.5.14.1
SD/MMC4.3 (Single Data Rate) AC Timing
Figure 36 depicts the timing of SD/MMC4.3, and Table 58 lists the SD/MMC4.3 timing characteristics.
Figure 36. SD/MMC4.3 Timing
Table 58. SD/MMC4.3 Interface Timing Specification
ID
Parameter
Symbols
Min
Max
Unit
Card Input Clock
SD1
Clock Frequency (Low Speed)
fPP
1
0
400
kHz
Clock Frequency (SD/SDIO Full Speed/High
Speed)
fPP
2
025/50
MHz
Clock Frequency (MMC Full Speed/High Speed)
fPP
3
020/52
MHz
Clock Frequency (Identification Mode)
fOD
100
400
kHz
SD2
Clock Low Time
tWL
7—
ns
SD3
Clock High Time
tWH
7—
ns
SD4
Clock Rise Time
tTLH
—3
ns
SD5
Clock Fall Time
tTHL
—3
ns
SSP Output / Card Inputs CMD, DAT (Reference to CLK)
SD6
SSP Output Delay
tOD
-5
5
ns
SSP Input / Card Outputs CMD, DAT (Reference to CLK)
SD1
SD3
SD5
SD4
SD7
CMD
output from SSP to card
DAT1
......
DAT7
DAT0
CMD
input from card to SSP
DAT1
......
DAT7
DAT0
SCK
SD2
SD8
SD6
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