參數(shù)資料
型號(hào)： PXA270
廠商： Intel Corp.
英文描述： Electrical, Mechanical, and Thermal Specification
中文描述： 電氣，機(jī)械和熱規(guī)格
文件頁數(shù)： 74/126頁
文件大小： 1563K
代理商： PXA270
6-10
Electrical, Mechanical, and Thermal Specification
Intel PXA270 Processor
AC Timing Specifications
6.2.7
Standby-Mode Timing
6.2.8
Idle-Mode Timing
6.2.9
Frequency-Change Timing
Table 6-9. Standby-Mode Timing Specifications
Symbol
Description
Min
Typical
Max
Units
—
13M mode to standby mode entry
—
0.34
—
msec
—
Standby mode exit to 13M mode
1
0.28
—
11.28
2
msec
—
Run mode to standby mode entry
—
0.34
—
msec
—
Standby mode exit to run mode
1
0.43
0.39
11.43
2
msec
NOTES:
1. The 13M oscillator is programmable
2. Add 0.1ms if the wake up event is external
Table 6-10. Idle-Mode Timing Specifications
Symbol
Description
Min
Typical
Max
Units
—
13M mode to deep idle mode entry
—
1
—
μ
s
—
Deep idle mode exit to 13M mode
—
1
—
μ
s
—
Run mode to idle run mode entry
—
1
—
μ
s
—
Idle run mode exit to run mode
—
1
—
μ
s
Table 6-11. Frequency-Change Timing Specifications
Symbol
Description
Min
Typical
Max
Units
—
Delay between MCR command to
frequency change sequence completion
—
150
1
—
μ
s
—
Delay to change between turbo, half-
turbo and run modes
—
1
2
—
μ
s
—
Delay to enter 13M mode from any Run
mode
—
1
—
μ
s
—
Delay to exit 13M mode to any Run mode
—
2
4
—
μ
s
NOTES:
1. Any change to the CCCR[2N or L] bits followed by a write to CLFCFG[F] to initiate a frequency change
sequence, results in a PLL restart
2. Changing between turbo, half-turbo and run modes does not require a PLL restart
3. Software can only change into 13M mode from any run mode
4. Assuming software uses the PLL early enable feature (CCCR[PLL_EARLY_EN] prior to a frequency
change sequence
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