at94k05al-25aqi ATMEL Corporation, at94k05al-25aqi Datasheet - Page 92

• Manufacturer Part Number: at94k05al-25aqi
• Description: 5k - 40k Gates Of At40k Fpga With 8-bit Microcontroller, Up To 36k Bytes Of Sram And On-chip Jtag Ice
• Manufacturer: ATMEL Corporation

92
AT94K Series FPSLIC
Figure 52. Effects of Unsynchronized OCR Latching in Up/Down Mode
Note:
Figure 53. Effects of Unsynchronized OCR Latching in Overflow Mode.
Note:
During the time between the write and the latch operation, a read from the Output Compare
Registers will read the contents of the temporary location. This means that the most recently
written value always will read out of OCR0 and OCR2.
When the Output Compare Register contains $00 or $FF, and the up/down PWM mode is
selected, the output PE1(OC0/PWM0)/PE3(OC2/PWM2) is updated to Low or High on the
next compare match according to the settings of COMn1/COMn0. This is shown in Table 25.
In overflow PWM mode, the output PE1(OC0/PWM0)/PE3(OC2/PWM2) is held Low or High
only when the Output Compare Register contains $FF.
Compare Value Changes
1. n = 0 or 2
1. n = 0 or 2
Compare Value Changes
Unsynchronized OCn
Synchronized OCn
Synchronized OCn
Unsynchronized OCn
(1)
(1)
(1)
Latch
Latch
Latch
(1)
Latch
Compare Value Changes
Glitch
Compare Value Changes
Glitch
Counter Value
Compare Value
PWM Output OCn
Counter Value
Compare Value
PWM Output OCn
Counter Value
Compare Value
PWM Output OCn
Counter Value
Compare Value
PWM Output OCn
Rev. 1138F–FPSLI–06/02
(1)
(1)
(1)
(1)