參數(shù)資料
型號(hào)： MPC8533EVTARJ
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 1067 MHz, MICROPROCESSOR, PBGA783
封裝： 29 X 29 MM, 1 MM PITCH, LEAD FREE, PLASTIC, FC-PBGA-783
文件頁數(shù)： 21/116頁
文件大?。?/td> 1273K
代理商： MPC8533EVTARJ
MPC8533E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 3
12
Freescale Semiconductor
Electrical Characteristics
2.1.3
Output Driver Characteristics
Table 3 provides information on the characteristics of the output driver strengths.
2.2
Power Sequencing
The device requires its power rails to be applied in specific sequence in order to ensure proper device
operation. These requirements are as follows for power up:
1. VDD, AVDD_n, BVDD, LVDD, SVDD, OVDD, TVDD, XVDD
2. GVDD
Note that all supplies must be at their stable values within 50 ms.
Items on the same line have no ordering requirement with respect to one another. Items on separate lines
must be ordered sequentially such that voltage rails on a previous step must reach 90% of their value before
the voltage rails on the current step reach 10% of theirs.
In order to guarantee MCKE low during power-up, the above sequencing for GV
DD is required. If there is
no concern about any of the DDR signals being in an indeterminate state during power up, then the
sequencing for GVDD is not required.
From a system standpoint, if any of the I/O power supplies ramp prior to the VDD core supply, the I/Os
associated with that I/O supply may drive a logic one or zero during power-up, and extra current may be
drawn by the device.
Table 3. Output Drive Capability
Driver Type
Programmable
Output Impedance
(
Ω)
Supply
Voltage
Notes
Local bus interface utilities signals
25
35
BVDD = 3.3 V
BVDD = 2.5 V
1
45 (default)
125
BVDD = 3.3 V
BVDD = 2.5 V
BVDD = 1.8 V
PCI signals
25
OVDD = 3.3 V
2
42 (default)
DDR signal
20
GVDD = 2.5 V
—
DDR2 signal
16
32 (half strength mode)
GVDD = 1.8 V
—
TSEC signals
42
LVDD = 2.5/3.3 V
—
DUART, system control, JTAG
42
OVDD = 3.3 V
—
I2C
150
OVDD = 3.3 V
—
Notes:
1. The drive strength of the local bus interface is determined by the configuration of the appropriate bits in PORIMPSCR.
2. The drive strength of the PCI interface is determined by the setting of the PCI_GNT1 signal at reset.
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