參數(shù)資料
型號: 73S8024RN-32IM/F
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 模擬信號調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, QCC32
封裝: LEAD FREE, QFN-32
文件頁數(shù): 4/27頁
文件大?。?/td> 319K
代理商: 73S8024RN-32IM/F
73S8024RN Data Sheet
DS_8024RN_020
12
Rev. 1.9
8 Deactivation Sequence
Deactivation is initiated either by the system controller by setting the
CMDVCC high, or automatically in
the event of hardware faults. Hardware faults are over-current, overheating, VDD fault, VPC fault, VCC fault,
and card extraction during the session. To be noted that VPC and VCC faults are linked together so that a
fault is generated when VPC goes lower than VCC.
The following steps show the deactivation sequence and the timing of the card control signals when the
system controller sets the
CMDVCC high or OFF goes low due to a fault or card removal:
RST goes low at the end of t1.
CLK is set low at the end of t2.
I/O goes low at the end of t3. Out of reception mode.
VCC is shut down at the end of time t4. After a delay t5 (discharge of the VCC capacitor), VCC is low.
RST
CLK
I/O
VCC
t
1
t
2
t
3
t
4
t
5
CMDVCC
-- OR --
OFF
t1 = > 0.5s, timing by 1.5MHz internal Oscillator
t2 = > 7.5s
t3 = > 0.5s
t4 = > 0.5s
t5 = depends on VCC filter capacitor.
For NDS application, CF=1F makes t1 + t2 + t3 + t4 + t5 < 100s
Figure 4: Deactivation Sequence
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