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參數資料
| 型號： | MC2GH512DMCA-2SA00 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | SAMSUNG MultiMediaCard |
| 中文描述： | 三星多媒體 |
| 文件頁數： | 17/102頁 |
| 文件大小： | 1384K |
| 代理商： | MC2GH512DMCA-2SA00 |
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MultiMediaCard
TM
17
Sep.22.2005
Revision 0.3
5.2.2 Power Protection
Cards shall be inserted/removed into/from the bus without damage. If one of the supply pins (V
DD
or V
SS
) is not connected
properly, then the current is drawn through a data line to supply the card. Every card’s output also shall be able to with-
stand shortcuts to either supply. If hot insertion feature is implemented in the host, than the host has to withstand a short-
cut between V
DD
and V
SS
without damage.
5.3 SPI Bus Topology
The SPI mode consists of a secondary, optional communication protocol which is offered by Flash-based MultiMedi-
aCards. This mode is a subset of the MultiMediaCard protocol, designed to communicate with a SPI channel. The Multi-
MediaCard SPI interface is compatible with SPI hosts available on the market. As in any other SPI device, the
MultiMediaCard SPI channel consists of the following four signals:
CS
: Host to card Chip Select signal
CLK
: Host to card clock signal
DataIn
: Host to card data signal
DataOut
: Card to host data signal
Another SPI common characteristic is byte transfers, which is implemented in the card as well. All data tokens are multi-
ples of bytes (8 bit) and always byte aligned to the CS signal.The SPI standard defines the physical link only, and not the
complete data transfer protocol.
The card identification and addressing methods are replaced by a hardware Chip Select (CS) signal. There are no broad-
cast commands. For every command, a card (slave) is selected by asserting (active low) the CS signal (see Figure ).
The CS signal must be continuously active for the duration of the SPI transaction (command, response and data). The
only exception occurs during card programming, when the host can de-assert the CS signal without affecting the program-
ming process.
The bidirectional CMD and DAT lines are replaced by unidirectional
dataIn
and
dataOut
signals. This eliminates the ability
to excute commands while data is being read or written which prevents swquential multi read/write operations. Only single
block read/write is supported by the SPI channel.
Figure 5-2 : MultiMediaCard Bus System
5.3.1 Power Protection
Power protection is the same as it is in MultiMediaCard mode.
SPI bus (CLK, DataIn, DataOut
)
SPI bus
master
Power
supply
CS
SPI
Card
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| MC2M | 制造商:G & J HALL 功能描述:STEP DRILL 10-20MM 1MM STEP 制造商:G & J HALL 功能描述:STEP DRILL, 10-20MM, 1MM STEP 制造商:G & J HALL 功能描述:STEP DRILL, 10-20MM, 1MM STEP; Drill Bit Size Metric:10mm; Overall Length:77.5mm; SVHC:No SVHC (19-Dec-2012); Drill Bit Type:Step; Material:Steel; Material Thickness Max:4mm; Range:10mm - 20mm; Range:10mm - 20mm; Shank Dia:9mm; ;RoHS Compliant: NA |
| MC2N2906A | 制造商:SPC Multicomp 功能描述:BIPOLAR TRANSISTOR, PNP, -60V TO-18; Transistor Polarity:PNP; Collector Emitter Voltage V(br)ceo:-60V; Transition Frequency Typ ft:200MHz; Power Dissipation Pd:400mW; DC Collector Current:-600mA; DC Current Gain hFE:40; No. of Pins:3;RoHS Compliant: Yes |
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