參數(shù)資料
型號: 79RC32K438233BBI
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 微控制器/微處理器
英文描述: IDTTM InterpriseTM Integrated Communications Processor
中文描述: 32-BIT, 233 MHz, RISC PROCESSOR, PBGA416
封裝: 27 X 27 MM, PLASTIC, BGA-416
文件頁數(shù): 39/59頁
文件大小: 644K
代理商: 79RC32K438233BBI
39 of 59
May 25, 2004
IDT 79RC32438
Power-on Sequence
Three power-on sequences are given below. Sequence #1 is recommended because it will prevent I/O conflicts and will also allow the input signals
to propagate when the I/O powers are brought up.
Note:
The ESD diodes may be damaged if one of the voltages is applied and one of the other voltages is at a ground level.
A. Recommended Sequence
t2 > 0 whenever possible (V
cc
Core)
t1 - t2 can be 0 (V
cc
SI/O followed by V
cc
I/O)
B. Reverse Voltage Sequence
If sequence A is not feasible, then Sequence B can be used:
t1 <50ms and t2 <50ms to prevent damage.
C. Simultaneous Power-up
VccI/O, VccSI/O, and VccCore can be powered up simultaneously.
1.2V
V
cc
3.3V
2.5V
V
cc
Time
t1
t2
I/O
VccI/O -- 3.3V
VccSI/O -- 2.5V
VccCore (266/300MHz) -- 1.3V
VccCore (200/233MHz) -- 1.2V
Vcc1.2
Vcc3.3
Vcc2.5
Time
t1
t2
VccI/O -- 3.3V
VccSI/O -- 2.5V
VccCore (266/300MHz) -- 1.3V
VccCore (200/233MHz) -- 1.2V
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