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| 型號： | MC12U256NACA |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | MultiMediaCard Specification |
| 中文描述： | 多媒體卡規(guī)格 |
| 文件頁數： | 18/66頁 |
| 文件大小： | 1422K |
| 代理商： | MC12U256NACA |
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MultiMediaCard
TM
18
4.2 Pin Assignments in SPI Mode
Table 4- 2 SPI Pad Definition
Pin No.
1
2
3
4
5
6
7
Note : 1. S: power supply; I: input; O: output; PP: push-pull; OD: open-drain; NC: No connection or V
IH
4.3 MultiMediaCard Bus Topology
The MultiMediaCard bus has three communication lines and four supply lines:
-
CMD: Command is a bi-directional signal. Host and card drivers are operating in two modes, open
drain and push pull.
-
DAT: Data is a bi-directional signal. Host and card drivers are operating in push pull mode.
-
CLK: Clock is a host to card signal. CLK operates in push pull mode.
-
VDD: VDD is the power supply line for all cards.
-
VSS[1:2]: VSS are two ground lines.
Name
CS
DI
V
ss
V
cc
SCLK
V
ss2
DO
Type
*1
I
I
S
S
I
S
O/PP
Description
Chip Select
Data In
Ground
Power supply
Clock
Ground
Data out
Figure 4-2 Bus Circuitry Diagram
The R
OD
is switched on and off by the host synchronously to the open-drain and push-pull mode
transitions. R
DAT
and R
CMD
are pull-up resistors protecting the CMD and the DAT line against bus
floating when no card is inserted or when all card drivers are in a hi-impedance mode. A constant
current source can replace the R
OD
by achieving a better performance (constant slopes for the signal
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MC12U256NACA-0QC00 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification |
| MC12U256NACB-0QC00 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification |
| MC12U256NACC-0QC00 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification |
| MC12U256NAFA-0QC00 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification |
| MC12U256NAFB-0QC00 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:MultiMediaCard Specification |
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