PNX1500E NXP Semiconductors, PNX1500E Datasheet - Page 285

• Manufacturer Part Number: PNX1500E
• Manufacturer: NXP Semiconductors

Specifications of PNX1500E

• Lead Free Status / Rohs Status: Not Compliant

NXP Semiconductors
Volume 1 of 1
PNX15XX_PNX952X_SER_N_4
Product data sheet
Figure 8:
Figure 9:
Figure 10: Sub-Carrier Multiplexing for TX
EN_IR_CARRIER,CARRIER_DIV
Ir TX Sub-carrier
Frequency
Ir TX Frequency
Ir TX signal
(no sub-carrier)
Ir TX signal
(with sub-carrier)
Example of Ir TX Signals with and without Sub-Carrier
IrDA Control TX with Sub-Carrier Enabled
DUTY_CYCLE
3.1 Duty-cycle programming
FREQ_DIV
required TX frequency and have the option to multiplex a sub-carrier frequency onto
the TX frequency if required.
requirements.
In the RC-MM IR protocol the duty-cycle of the sub-carriers must be between 25-
50%. To accommodate this protocol and others it is possible to program the duty-
cycle to be either 33%, 50%, or 66%.
IrDA Control
signal
Sub-carrier
Generation
Rev. 4.0 — 03 December 2007
Pattern
Generator
10 sub-carriers
6.67 s
Figure 8 Figure 9
sub-carrier
Chapter 8: General Purpose Input Output Pins
Data
and
PNX15xx/952x Series
Figure 10
EN_IR_CARRIER
1
0
illustrate the signal
© NXP B.V. 2007. All rights reserved.
IROUT
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