參數(shù)資料
型號： MPC8545EVTAQGB
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 1000 MHz, MICROPROCESSOR, PBGA783
封裝： 29 X 29 MM, 1 MM PITCH, FLIP CHIP, LEAD FREE, PLASTIC, BGA-783
文件頁數(shù)： 35/142頁
文件大小： 1504K
代理商： MPC8545EVTAQGB
MPC8548E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5
Freescale Semiconductor
13
Electrical Characteristics
2.1.3
Output Driver Characteristics
Table 3 provides information on the characteristics of the output driver strengths. The values are
preliminary estimates.
2.2
Power Sequencing
The device requires its power rails to be applied in a specific sequence in order to ensure proper device
operation. These requirements are as follows for power-up:
1. VDD, AVDD_n, BVDD, LVDD, OVDD, SVDD, TVDD, XVDD
2. GVDD
All supplies must be at their stable values within 50 ms.
NOTE
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.
Table 3. Output Drive Capability
Driver Type
Programmable
Output Impedance
(
Ω)
Supply
Voltage
Notes
Local bus interface utilities signals
25
BVDD = 3.3 V
BVDD = 2.5 V
1
45(default)
BVDD = 3.3 V
BVDD = 2.5 V
PCI signals
25
OVDD = 3.3 V
2
45(default)
DDR signal
18
36 (half strength mode)
GVDD = 2.5 V
3
DDR2 signal
18
36 (half strength mode)
GVDD = 1.8 V
3
TSEC/10/100 signals
45
L/TVDD = 2.5/3.3 V
—
DUART, system control, JTAG
45
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.
3. The drive strength of the DDR interface in half-strength mode is at Tj = 105°C and at GVDD (min).
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