参数资料
型号: MCIMX258CJM4
厂商: Freescale Semiconductor
文件页数: 137/153页
文件大小: 0K
描述: MPU IMX25 IND 400-MAPBGA
特色产品: MCIMX25 Applications Processors
标准包装: 90
系列: i.MX25
核心处理器: ARM9
芯体尺寸: 32-位
速度: 400MHz
连通性: 1 线,CAN,EBI/EMI,以太网,I²C,MMC,智能卡,SPI,SSI,UART/USART,USB OTG
外围设备: DMA,I²S,LCD,POR,PWM,WDT
输入/输出数: 128
程序存储器类型: 外部程序存储器
RAM 容量: 144K x 8
电压 - 电源 (Vcc/Vdd): 1.15 V ~ 1.52 V
数据转换器: A/D 3x12b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 400-LFBGA
包装: 托盘
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 10
84
Freescale Semiconductor
Figure 54. eSDHCv2 Timing
Table 61. eSDHCv2 Interface Timing Specification
ID
Parameter
Symbols
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 to 3.6 V.
0400
kHz
Clock frequency (SD/SDIO full speed/high speed)
fPP
2
2 In normal-speed mode for 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.
0
25/50
MHz
Clock frequency (MMC full speed/high speed)
fPP
3
3 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 ~ 52 MHz.
0
20/52
MHz
Clock frequency (identification mode)
fOD
100
400
kHz
SD2
Clock low time
tWL
6.5
ns
SD3
Clock high time
tWH
6.5
ns
SD4
Clock rise time
tTLH
—3
ns
SD5
Clock fall time
tTHL
—3
ns
eSDHC Output / Card Inputs CMD, DAT (Reference to CLK)
SD6
eSDHC output delay
tOD
–33ns
eSDHC Input / Card Outputs CMD, DAT (Reference to CLK)
SD7
eSDHC input setup time
tISU
2.5
ns
SD8
eSDHC input hold time
tIH
4
4 To satisfy hold timing, the delay difference between clock input and cmd/data input must not exceed 2 ns.
2.5
ns
SD1
SD3
SD5
SD4
SD7
CMD
output from eSDHCv2 to card
DAT1
......
DAT7
DAT0
CMD
input from card to eSDHCv2
DAT1
......
DAT3
DAT0
CLK
SD2
SD8
SD6
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