LUPXA255A0C300 Intel, LUPXA255A0C300 Datasheet - Page 30

• Manufacturer Part Number: LUPXA255A0C300
• Description: IC MICRO PROCESSOR 300MHZ 256BGA
• Manufacturer: Intel

Specifications of LUPXA255A0C300

• Processor Type: XScale®
• Speed: 300MHz
• Voltage: 3.3V
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Other names: 866869

Electrical Specifications
4.7
4.7.1
30
Note: The minimum duty cycle for an external signal driven into PEXTAL is 40/60.
Reset and Power AC Timing Specifications
The processor asserts the nRESET_OUT pin in one of several different modes:
The following sections provide the timing and specifications for the entry and exit of these modes.
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.
Timing” on page
Specifications” on page
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:
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
anytime within the specification shown in
1. VCCQ
2. VCCN
3. VCC and PLL_VCC
•
•
•
•
•
Power on
Hardware reset
Watchdog reset
GPIO reset
Sleep mode
Intel® PXA255 Processor Electrical, Mechanical, and Thermal Specification
31, shows this sequence and is detailed in
31.
Figure 3
and
Table
Table 15, “Power-On Timing
15.
Figure 3, “Power-On Reset