參數(shù)資料
型號(hào)： flas00xx
廠商： SIEMENS AG
英文描述： MultiMediaCard(多媒體卡)
中文描述： 多媒體卡（多媒體卡）
文件頁(yè)數(shù)： 22/79頁(yè)
文件大?。?/td> 516K
代理商： FLAS00XX
MultiMediaCard Flash
Preliminary MultiMediaCard Product Manual;
1998 SANDISK CORPORATION
Page 22 of 79
Figure 4-3 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 rising and falling edges). If the host does not allow the switchable R
OD
implementation, a fix R
CMD
can be used. Consequently the maximum operating frequency in
the open drain mode has to be reduced in this case.
Hot insertion/removal
In general hot insertion and removal is allowed. No card should be damaged by inserting
or removing a card into the MultiMediaCard bus even when the power is up.
The data transfer operations are protected by CRC codes, so that bit changes induced by
card insertion/remove could be detected by the MultiMediaCard bus master.
The inserted card must be properly reset also when CLK carries a clock frequency f
PP
.
Each card has to have power protection to prevent card (and host) damage.
Data transfer failures induced by removal/insertion are detected by the bus master.
They must be corrected by the application. Correction should be done by command
repetition in most cases.
4.2.1 Power Protection
Cards can 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 cards output must also be able to withstand short cuts to either supply.
If hot insertion feature is implemented in the host, than the host has to withstand a shortcut
between V
DD
and V
SS
without damage.
1 2 3 4 5 6 7
Card
CMD
DAT
CLK
Host
R
CMD
R
DAT
R
OD
C = max (C , C , C )
BUS
1
2
3
C
1
C
2
C
3
相關(guān)PDF資料
PDF描述
FLC-453232-R56M FLC-453232-R56M
FLEX405 Fire Alarm Control Panel with built-in DACT and remote-site upload/download capability
FLI2300 DIGITAL VIDEO FORMAT CONVERTER
FLI8532 Single-Chip LCD TV Controller
FLI8538 Single-Chip Enhanced LCD TV Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
FLASH 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Flash Memory Brochure
FLASH CARD-128 功能描述:存儲(chǔ)卡 128 MEG FLASH CARD RoHS:否 制造商:Olimex Ltd. 產(chǎn)品:SD 存儲(chǔ)容量: 連續(xù)讀取: 連續(xù)寫入: 有源模式電流: 工作電源電壓: 最大工作溫度: 尺寸:
FLASH CARD-512 功能描述:存儲(chǔ)卡 512 MB COMPACT FLASH CARD RoHS:否 制造商:Olimex Ltd. 產(chǎn)品:SD 存儲(chǔ)容量: 連續(xù)讀取: 連續(xù)寫入: 有源模式電流: 工作電源電壓: 最大工作溫度: 尺寸:
FLASH PRO 4 制造商:Microsemi Corporation 功能描述:
FLASH-150Z 制造商:Amprobe Test Tools 功能描述:FLASHLIGHT - 2 AA BATTERIES W/ ZOOM ;ROHS COMPLIANT: NA
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*