The device supports three smart card VCC voltages:
參數(shù)資料
型號(hào)： DS8005-KIT#
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 8/20頁(yè)
文件大小： 0K
描述： EVALUATION KIT FOR DS8005
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 1
主要目的： 接口，模擬前端（AFE）
已用 IC / 零件： DS8005
已供物品： 板
相關(guān)產(chǎn)品： DS8005-RRX+-ND - SMART CARD AFE DUAL 28SOIC
其它名稱： 90-08005#KIT
DS8005
Smart Card Power Select
The device supports three smart card VCC voltages:
1.8V, 3V, and 5V. The power select is controlled by the
1_8V and 5V/3V signals as shown in Table 3. The 1_8V
signal has priority over 5V/3V. When 1_8V is asserted
high, 1.8V is applied to VCC when the smart card is
active. When 1_8V is deasserted, 5V/3V dictates VCC
power range. VCC is 5V if 5V/3V is asserted to a logic-
high state, and VCC is 3V if 5V/3V is pulled to a
logic-low state. Care must be exercised when switching
from one VCC power selection to the other. If both 1_8V
and 5V/3V are high with CMDVCC high at the same
time, the device enters stop mode. To avoid accidental
entry into stop mode, the state of 1_8V and 5V/3V must
not be changed simultaneously. A minimum delay of
100ns should be observed between changing the
states of 1_8V and 5V/3V. See Figure 9 for the recom-
mended sequence of changing the VCC range.
Smart Card Interface
16
______________________________________________________________________________________
VCC SELECT
STOP MODE
1.8V
3V
5V
1_8V
5V/3V
CMDVCC
Figure 9. Smart Card Power Select
Table 3. VCC Select and Operation Mode
1_8V
5V/3V
CMDVCC
VCC SELECT (V)
CARD INTERFACE STATUS
0
3
Activated
0
1
3
Inactivated
0
1
0
5
Activated
0
1
5
Inactivated
1
0
1.8
Activated
1
0
1
1.8
Inactivated
1
0
1.8
Reserved (Activated)
1
1.8
Not Applicable—Stop Mode
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