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參數(shù)資料
| 型號： | PXA255 |
| 廠商： | Intel Corp. |
| 英文描述： | PXA255 Processor |
| 中文描述： | PXA255處理器 |
| 文件頁數(shù)： | 23/40頁 |
| 文件大?。?/td> | 1191K |
| 代理商： | PXA255 |
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Electrical Specifications
Intel PXA255 Processor
Electrical, Mechanical, and Thermal Specification
23
4.2
Power Consumption Specifications
Power consumption depends on the operating voltage, peripherals enabled, external switching
activity, and external loading.
Specifying maximum power consumption requires all units to be run at their maximum
performance, and at maximum voltage and loading conditions. The maximum power consumption
of the PXA255 processor is calculated using these conditions:
All peripheral units operating at maximum frequency and size configuration
All I/O loads maximum (50 pF)
Core operating at worst-case power scenario (hit rates adjusted for worst power)
All voltages at maximum of range. Maximum range for the core voltage is set to maintain
compatibility with the PXA250.
Maximum case temperature
Do not exceed the maximum package power rating or T
case
temperature.
Since few systems operate at maximum loading, performance, and voltage, a more optimal system
design requires more typical power-consumption figures. These figures are important when
considering battery size and optimizing regulator efficiency. Typical systems operate with fewer
modules active and at nominal voltage and load. The typical power consumption for the PXA255
processor is calculated using these conditions:
SSP, STUART, USB, PWM, Timer, I2S peripherals operating
Table 7. Absolute Maximum Ratings
Symbol
Description
Min
Max
Units
TS
Storage Temperature
-40
125
°C
VSS_O
Offset Voltage between any two VSS pins (VSS, VSSQ,
VSSN)
-0.3
0.3
V
VCC_O
Offset Voltage between any of the following pins:
VCCQ and VCCN
-0.3
0.3
V
VCC_HV
Voltage Applied to High Voltage Supplies (VCCQ, VCCN)
VSS-0.3
VSS+4.0
V
VCC_LV
Voltage Applied to Low Voltage Supplies (VCC,
PLL_VCC)
VSS-0.3
VSS+1.65
V
VIP
Voltage Applied to non-Supply pins except XTAL pins
VSS-0.3
max of
VCCQ+0.3,
VSS+4.0
V
VIP_X
Voltage Applied to XTAL pins (PXTAL, PEXTAL, TXTAL,
TEXTAL)
VSS-0.3
max of
VCC+0.3,
VSS+1.65
V
VESD
Maximum ESD stress voltage, Human Body Model; Any
pin to any supply pin, either polarity, or Any pin to all non-
supply pins together, either polarity. Three stresses
maximum.
2000
V
IEOS
Maximum DC Input Current (Electrical Overstress) for any
non-supply pin
5
mA
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