參數(shù)資料
型號(hào)： SAK-TC1765T-L40EB
廠商： INFINEON TECHNOLOGIES AG
元件分類： 微控制器/微處理器
英文描述： 32-BIT, MROM, 40 MHz, MICROCONTROLLER, PBGA260
封裝： PLASTIC, LBGA-260
文件頁數(shù)： 54/88頁
文件大?。?/td> 1274K
代理商： SAK-TC1765T-L40EB
TC1765
Data Sheet
54
V1.2, 2002-12
Preliminary
Ports Power Supply
The TC1765’s port power supply concept is shown in Figure 19. The External Bus Unit
(EBU) I/O lines are in the core and EBU
VDD power supply group for 2.5 V nominal
operating voltage. The general purpose input/outputs (GPIOs) provide 3.3 to 5 V nominal
voltage input/output acceptance and drive characteristics.
Figure 19
Ports Power Supply Concept
Power-up Sequence
During Power-up the reset pin PORST has to be held active until both power supply
voltages have reached at least their minimum values.
During the Power-up time (rising of the supply voltages from 0 to their regular operating
values) it has to be ensured, that the difference between
VDDP and VDD never drops
below -0.5 V.
Power Loss
If
VDDP is dropping below VDD, external circuitry in the power supply has to ensure, that
VDD is also limited to the same level.
If
VDDI is dropping below the operating range, VDDP may stay active.
Powering Down
During powering down (falling of the supply voltages from their regular operating values
to zero), it has to be ensured, that the difference between
VDDP and VDD never drops
below -0.5 V.
MCA05226
V
SS
EBU I/O Lines
(Pads)
&
Schmitt Trigger
Ports 0 to 5
(Pads)
&
Schmitt Trigger
V
DD
(2.5 V)
V
DDP
(3.3 - 5 V)
Port Logic
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