參數(shù)資料
型號: MC9328MX21CVMR2
廠商: Freescale Semiconductor
文件頁數(shù): 31/100頁
文件大小: 0K
描述: IC MCU I.MX21 266MHZ 289-MAPBGA
標(biāo)準(zhǔn)包裝: 1,000
系列: i.MX21
核心處理器: ARM9
芯體尺寸: 32-位
速度: 266MHz
連通性: 1 線,EBI/EMI,I²C,IrDA,MMC,智能卡,SPI,SSI,UART/USART,USB OTG
外圍設(shè)備: DMA,I²S,LCD,POR,PWM,WDT
輸入/輸出數(shù): 192
程序存儲器類型: ROMless
電壓 - 電源 (Vcc/Vdd): 1.45 V ~ 3.3 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 289-LFBGA
包裝: 帶卷 (TR)
MC9328MX21 Technical Data, Rev. 3.4
36
Freescale Semiconductor
Specifications
3.12
Multimedia Card/Secure Digital Host Controller
The DMA interface block controls all data routing between the external data bus (DMA access), internal
MMC/SD module data bus, and internal system FIFO access through a dedicated state machine that
monitors the status of FIFO content (empty or full), FIFO address, and byte/block counters for the MMC/
SD module (inner system) and the application (user programming).
Figure 25. Chip-Select Read Cycle Timing Diagram
Table 26. SDHC Bus Timing Parameters
Ref
No.
Parameter
1.8 V
± 0.1 V
3.0 V
± 0.3 V
Unit
Min
Max
Min
Max
1
CLK frequency at Data transfer Mode (PP)1—10/30 cards
1. CL 100 pF / 250 pF (10/30 cards)
0
25/5
0
25/5
MHz
2
CLK frequency at Identification Mode2
2. CL 250 pF (21 cards)
0
400
0
400
kHz
3a
Clock high time1—10/30 cards
6/33
10/50
ns
3b
Clock low time1—10/30 cards
15/75
10/50
ns
4a
Clock fall time1—10/30 cards
10/50 (5.00)3
10/50
ns
4b
Clock rise time1—10/30 cards
14/67 (6.67)3
10/50
ns
5a
Input hold time3—10/30 cards
3. CL 25 pF (1 card)
5.7/5.7
5/5
ns
5b
Input setup time3—10/30 cards
5.7/5.7
5/5
ns
6a
Output hold time3—10/30 cards
5.7/5.7
5/5
ns
6b
Output setup time3—10/30 cards
5.7/5.7
5/5
ns
7
Output delay time3
016
0
14
ns
Bus Clock
5b
6b
6a
7
5a
4a
3a
CMD_DAT Input
CMD_DAT Output
4b
3b
Valid Data
1 2
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