PNX1700EH,557 NXP Semiconductors, PNX1700EH,557 Datasheet - Page 290
PNX1700EH,557
Manufacturer Part Number
PNX1700EH,557
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1700EH557.pdf
(832 pages)
Specifications of PNX1700EH,557
Operating Temperature (min)
0C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Not Compliant
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Philips Semiconductors
Volume 1 of 1
PNX17XX_SER_1
Preliminary 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. 1 — 17 March 2006
Pattern
Generator
10 sub-carriers
6.67 s
Figure 8 Figure 9
sub-carrier
Chapter 8: General Purpose Input Output Pins
Data
and
Figure 10
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
EN_IR_CARRIER
PNX17xx Series
1
0
illustrate the signal
IROUT
8-19
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