參數(shù)資料
型號(hào): romr0002
廠商: SIEMENS AG
英文描述: MultiMediaCard R0002 2 Mbyte ROM(多媒體卡 R0002 2 Mbyte ROM)
中文描述: 多媒體R0002 2字節(jié)的光盤(pán)(多媒體卡R0002 2字節(jié)光盤(pán))
文件頁(yè)數(shù): 34/41頁(yè)
文件大小: 207K
代理商: ROMR0002
Siemens
Product Manual R0002
Semiconductor Group
34
3.1
9.4
Short cut protection
The R0002 can be inserted/removed into/from the bus without damage. If one of the supply pins
(V
DD
, V
SS
or V
PP
) is not connected properly, then the current is drawn through a data line to supply
the card. Naturally the card can not operate properly under these conditions.
Every R0002 output withstands shortcuts to either supply.
Figure 17: Improper power supply
V
DD
Vss
CMD, DAT
V
DD
not connected
V
ss
not connected
Card
Controller
Figure 18: Short cut protection
V
DD
Vss
CMD, DAT
I
short
I
short
w
Connector
Card
Controller
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