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HC705RC16GRS/D Datasheet(PDF) 75 Page - NXP Semiconductors

Part # HC705RC16GRS/D
Description  The MC68HC705RC16 is a low-cost addition to the M68HC05 Family of microcontrollers (MCUs) and is suitable for remote control applications.
PDF  120 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

HC705RC16GRS/D Datasheet(HTML) 75 Page - NXP Semiconductors

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Carrier Modulator Transmitter (CMT)
Modulator
MC68HC705RC16 — Rev. 3.0
General Release Specification
Carrier Modulator Transmitter (CMT)
Figure 9-8. CMT Operation in Time Mode
9.5.2 FSK Mode
When the modulator operates in FSK mode, the modulation mark and
space periods consist of an integer number of carrier clocks (space
period can be zero). When the mark period expires, the space period is
transparently started (as in time mode); however, in FSK mode the
carrier switches between data registers in preparation for the next mark
period. The carrier generator toggles between primary and secondary
data register values whenever the modulator mark period expires. The
space period provides an interpulse gap (no carrier), but if SBUFF = 0,
then the modulator and carrier generator will switch between carrier
frequencies without a gap or any carrier glitches (zero space).
Using timing data for carrier burst and interpulse gap length calculated
by the CPU, FSK mode can automatically generate a phase-coherent,
dual-frequency FSK signal with programmable burst and interburst
gaps.
MODULATOR GATE
fOSC ÷ 8
TIME MODE OUTPUT
BASEBAND OUTPUT
MARK
SPACE
MARK
MARK
SPACE
CARRIER FREQUENCY
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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