pnx1500 NXP Semiconductors, pnx1500 Datasheet - Page 52

• Manufacturer Part Number: pnx1500
• Description: Pnx15xx Series Connected Media Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Volume 1 of 1
Table 18: MPEG-2 Decoding with 720x480P Output on PNX1502
PNX15XX_SER_3
Product data sheet
PNX1502
mA
W
1.3 V - VDD
1002
1.302
5.4.1 Typical Power Consumption for Typical Applications
5.4.2 Expected Maximum Currents
5.4 Power Consumption
The standby mode is obtain by specifically turning off the different clocks, i.e. it is not
just a simple bit to flip into a register. Once all the clocks have been shutdown the
power dissipation is at most 300 mW (includes leakage current) at 85 ˚C (case
temperature).
The power consumption of the PNX15xx Series is dependent on the activity of the
TM3260, the number of modules operating, the frequencies at which the system is
running, the core voltage, as well as the loads at board level on each pin. For these
reasons it is difficult to provide precise power consumption numbers.
Three main techniques can be applied to reduce the ‘Out of the Box’ power
consumption of the PNX1500 system:
Example:
savings).
Typical power consumption for typical applications on PNX15xx Series is expected to
ranges from 1.2 W to 2 W.
Table 19
speed which is not what a real application will do. Board design, i.e. decoupling and
regulators, should plan for peak current. Peak currents are possible for few cycles it is
not sustained current consumption. These peaks will be averaged out by the
decoupling capacitors, but regulators should also not be under-dimensioned.
Table 19: Estimated PNX15xx Series Maximum and Peak current
PNX15xx Series
Maximum, mA
Peak, mA
•
•
•
Turn off the unused modules. After reset, the modules are clocked with a 27 MHz
clock (input crystal clock, XTAL_IN). Turning off the clocks of the unused modules
significantly reduces the power consumption.
Run the PNX1500 system with the adjusted clock speeds for each active module.
This can include dynamic tuning to the TM3260 speed.
Powerdown the TM3260 every time the OS (Operating System) reaches the idle
task.
2.6 V - VCCM
104
0.270
presents estimated maximum currents, i.e. all modules operating at full
Table 18
Rev. 3 — 17 March 2006
VDD
1400
2000
presents a typical case (not optimized for power consumption
3.3 V - VCCP
53
0.175
VCCM
300
500
Total
n/a
1.747
Chapter 1: Integrated Circuit Data
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
VCCP
200
300
PNX15xx Series
1-25