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PXA250 and PXA210 Applications Processors Design Guide 8-3
Power and Clocking
Since few systems operate at maximum loading, performance, and voltage, a more optimal system
design requires more typical power consumption parameters. These parameters are important when
considering battery size and optimizing regulator efficiency. Typical systems operate with fewer
modules active and at nominal voltage and load. Typical power consumption for the applications
processor is calculated using these conditions:
• SSP, STUART, USB, PWM, Timer, I2S peripherals operating
• LCD enabled with 320x240x16bit color
• MMC, AC97, BTUART, FFUART, ICP, I2C peripherals disabled
• I/O loads at nominal (35pf for all pins)
• Core operating at 98% Instruction Hit Rate, 95% Data Hit Rate
• All voltages at nominal value
The individual power supply specifications add up to more than the total because the operating
conditions which cause maximum power consumption on each supply are sometimes mutually
exclusive.
Table 8-3. Power Consumption Specifications (Sheet 1 of 2)
Symbol Description Min
1
Typical
1
Max
1
Package, Frequency, and Voltage Range Independent Power Supplies
P
VCCQ
Power from VCCQ Supply — 16 mW 115 mW
Low Voltage Range (PXA210 and PXA250)
P
T_L
Total Power, Low Range — 250 mW 550 mW
P
VCC_L
Power from VCC Supply, Low Range — 110 mW 65 mW
P
VCCN_L
@2.5V
Power from VCCN Supply, Low Range — 65 mW 145 mW
P
VCCN_L
@3.3V
Power from VCCN Supply, Low Range — 120 mW 250 mW
PT_IDLE_L Total Power, IDLE Mode, Low Range — 110mW —
Medium Voltage Range (PXA250 and PXA210)
P
T_MM
Total Power, Mid Range (PXA210 applications processor) — 350 mW 690 mW
P
T_MB
Total Power, Mid Range (PXA250 applications processor) — 420 mW 840 mW
P
VCC_M
Power from VCC Supply, Mid Range — 180 mW 130 mW
P
VCCN_MM
Power from VCCN Supply, Mid Range (PXA210 applications
processor)
— 160 mW 325 mW
P
VCCN_MB
@2.5V
Power from VCCN Supply, Mid Range (PXA250 applications
processor)
— 100 mW 250 mW
P
VCCN_MB
@3.3V
Power from VCCN Supply, Mid Range (PXA250 applications
processor)
— 160 mW 440 mW
PT_IDLE_M Total Power, IDLE Mode, Medium Range — 110mW —
High Voltage Range (PXA250 applications processor only)
P
T_HB
Total Power, High Range (PXA250 applications processor) — 450 mW 890 mW
P
VCC_H
Power from VCC Supply, High Range — 275 mW 220 mW