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参数资料
| 型号： | QLPXA263B1C400 |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 400 MHz, RISC PROCESSOR, PBGA294 |
| 封装： | 13 X 13 MM, 1.4MM PITCH, PLASTIC, TPBGA-294 |
| 文件页数： | 24/44页 |
| 文件大小： | 1302K |
| 代理商： | QLPXA263B1C400 |
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Electrical Specifications
30
Intel PXA255 Processor Electrical, Mechanical, and Thermal Specification
Note: The minimum duty cycle for an external signal driven into PEXTAL is 40/60.
4.7
Reset and Power AC Timing Specifications
The processor asserts the nRESET_OUT pin in one of several different modes:
Power on
Hardware reset
Watchdog reset
GPIO reset
Sleep mode
The following sections provide the timing and specifications for the entry and exit of these modes.
4.7.1
Power-On Timing
The external voltage regulator and other power-on devices must provide the processor with a
specific sequence of power and resets to ensure proper operation. Figure 3, “Power-On Reset
Timing” on page 31, shows this sequence and is detailed in Table 15, “Power-On Timing
On the processor, it is important that the power supplies be powered up in a certain order to avoid
high current situations. The required order is:
1. VCCQ
2. VCCN
3. VCC and PLL_VCC
On the processor, it is important that the VCCQ power supply be powered up before or at the same
time as the VCCN power supply. The VCC and PLL_VCC power supplies may be powered up
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