PNX1501E,557 NXP Semiconductors, PNX1501E,557 Datasheet - Page 287

• Manufacturer Part Number: PNX1501E,557
• Description: IC MEDIA PROC 266MHZ 456-BGA
• Manufacturer: NXP Semiconductors

Specifications of PNX1501E,557

• Applications: Multimedia
• Core Processor: TriMedia
• Controller Series: Nexperia
• Interface: I²C, 2-Wire Serial
• Number Of I /o: 61
• Voltage - Supply: 1.14 V ~ 1.26 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 456-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Program Memory Type: -
• Ram Size: -
• Other names: 935274728557; PNX1501E; PNX1501E

Philips Semiconductors
Volume 1 of 1
PNX15XX_SER_3
Product data sheet
Figure 11: Examples of Duty Cycles for Ir TX Signals
IROUT
Actual Sub-carrier Freq.
Programmed Freq.
3.2 Spike Filtering
In the 33% and 66% duty-cycle cases FREQ_DIV must be programmed such that the
resulting frequency is 3 times the actual sub-carrier frequency, i.e the minimum pulse
width (high or low) is programmed. Similarly, in the 50% duty-cycle case FREQ_DIV
must be programmed such that the resulting frequency is 2 times the actual sub-
carrier frequency.
33%
When signal sampling at a programmed frequency a filtering feature is available in
the GPIO module which filters out spikes which may occur on a Ir RX signal. This
feature is enabled by programming the EN_IR_FILTER and IR_FILTER registers. The
IR_FILTER value represents the spike filter pulse width, i.e all pulses less than the
IR_FILTER pulse width are considered spikes and not passed through to the signal
monitoring control.
Rev. 3 — 17 March 2006
Actual Sub-carrier Freq.
Programmed Freq.
50%
Chapter 8: General Purpose Input Output Pins
Actual Sub-carrier Freq.
Programmed Freq.
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
66%
PNX15xx Series
8-20