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■ Block Diagram of the 16-Bit Pulse Frequency Modulator
16
8
16
3
16
8
16
3
Figure 1-2 Block Diagram of the 16-bit Pulse Frequency Modulator
16-bit reload register
16-bit down-counter
GATE
Clock selector
φ
φ
φ
φ
φ
Clear
prescaler
1
3
5
6
7
2
2
2
2
2
Internal clock
16-bit reload register
16-bit down-counter
GATE
Clock selector
φ
φ
φ
φ
φ
Clear
prescaler
2
1
2
3
2
5
2
6
2
7
Internal clock
Reload
UF
CSL2
CSL1
CSL0
Pulse Gen.
Reload
UF
CSL2
CSL1
CSL0
Chapter 40 Pulse Frequency Modulator
1.PFM Overview
RELD
–
–
INTE
UF
CNTE
TRG
INV
OUT
RELD
–
–
INTE
UF
CNTE
TRG
IRQ
825
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