参数资料
型号: MC9328MX21CVM
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 266 MHz, MICROPROCESSOR, PBGA289
封装: 14 X 14 MM, 1.41 MM HEIGHT, 0.65 MM PITCH, LEAD FREE, PLASTIC, MAPBGA-289
文件页数: 31/100页
文件大小: 1979K
代理商: MC9328MX21CVM
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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