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參數(shù)資料
| 型號(hào)： | MC9328MX21CVM |
| 廠商： | Motorola, Inc. |
| 英文描述： | i.MX family of microprocessors |
| 中文描述： | i.MX系列微處理器 |
| 文件頁數(shù)： | 65/96頁 |
| 文件大?。?/td> | 1495K |
| 代理商： | MC9328MX21CVM |
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Specifications
MC9328MX1 Advance Information, Rev. 4
Freescale Semiconductor
65
3.15.1 Command Response Timing on MMC/SD Bus
The card identification and card operation conditions timing are processed in open-drain mode. The card response
to the host command starts after exactly N
ID
clock cycles. For the card address assignment, SET_RCA is also
processed in the open-drain mode. The minimum delay between the host command and card response is NCR
clock cycles as illustrated in Figure 48. The symbols for Figure 48 through Figure 52 are defined in Table 30.
Figure 48. Timing Diagrams at Identification Mode
After a card receives its RCA, it switches to data transfer mode. As shown on the first diagram in Figure 49 on
page 66, SD_CMD lines in this mode are driven with push-pull drivers. The command is followed by a period of
two Z bits (allowing time for direction switching on the bus) and then by P bits pushed up by the responding card.
The other two diagrams show the separating periods N
RC
and N
CC
.
Table 30. State Signal Parameters for Figure 48 through Figure 52
Card Active
Host Active
Symbol
Definition
Symbol
Definition
Z
High impedance state
S
Start bit (0)
D
Data bits
T
Transmitter bit
(Host = 1, Card = 0)
*
Repetition
P
One-cycle pull-up (1)
CRC
Cyclic redundancy check bits (7 bits)
E
End bit (1)
SET_RCA Timing
Identification Timing
Host Command
CID/OCR
N
ID
cycles
CMD
Content
ST
EZ
Z S T
Content
Z Z
******
CRC
Z
Host Command
CID/OCR
N
CR
cycles
CMD
Content
ST
EZ
Z S T
Content
Z Z
******
CRC
Z
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC9328MX21CVM | 制造商:Freescale Semiconductor 功能描述:Microprocessor |
| MC9328MX21CVMR2 | 功能描述:處理器 - 專門應(yīng)用 DB I.MX21 17X17 PB-FR RoHS:否 制造商:Freescale Semiconductor 類型:Multimedia Applications 核心:ARM Cortex A9 處理器系列:i.MX6 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:1 GHz 指令/數(shù)據(jù)緩存: 數(shù)據(jù) RAM 大小:128 KB 數(shù)據(jù) ROM 大小: 工作電源電壓: 最大工作溫度:+ 95 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MAPBGA-432 |
| MC9328MX21DVG | 制造商:Rochester Electronics LLC 功能描述:DB I.MX21 - Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
| MC9328MX21DVGR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC9328MX21DVH | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:i.MX family of microprocessors |
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