at94k40al ATMEL Corporation, at94k40al Datasheet - Page 109
at94k40al
Manufacturer Part Number
at94k40al
Description
At94kal Series Field Programmable System Level Integrated Circuit
Manufacturer
ATMEL Corporation
Datasheet
1.AT94K40AL.pdf
(204 pages)
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1138I–FPSLI–1/08
Figure 4-33. Effects on Unsynchronized OCR1 Latching
Note:
Figure 4-34. Effects of Unsynchronized OCR1 Latching in Overflow Mode
Note:
During the time between the write and the latch operation, a read from OCR1A or OCR1B will
read the contents of the temporary location. This means that the most recently written value
always will read out of OCR1A/B.
When the OCR1X contains $0000 or TOP, and the up/down PWM mode is selected, the output
OC1A/OC1B is updated to Low or High on the next compare match according to the settings of
COM1A1/COM1A0 or COM1B1/COM1B0. This is shown in
the output OC1A/OC1B is held Low or High only when the Output Compare Register contains
TOP.
Compare Value Changes
1. X = A or B
1. X = A or B
Unsynchronized
Synchronized
Unsynchronized OC1x
Compare Value Changes
Synchronized OC1x
OCR1X
OCR1X
(1)
(1)
(1)
Latch
Latch
(1)
Latch
Latch
AT94KAL Series FPSLIC
Compare Value Changes
Compare Value Changes
Glitch
Table
4-22. In overflow PWM mode,
PWM Output OC1x
PWM Output OC1x
Compare Value
Counter Value
PWM OutputOC1X
Counter Value
Compare Value
PWM OutputOC1X
(1)
(1)
(1)
(1)
109
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