ATA6613 ATMEL Corporation, ATA6613 Datasheet - Page 175

• Manufacturer Part Number: ATA6613
• Description: Ata6613
• Manufacturer: ATMEL Corporation

9111C–AUTO–02/08
Table 6-60
rect PWM mode.
Table 6-60.
Note:
Table 6-61.
Table 6-62
mode.
Table 6-62.
Note:
• Bits 5:4 – COM2B1:0: Compare Match Output B Mode
COM2A1
COM2B1
COM2B1
These bits control the Output Compare pin (OC2B) behavior. If one or both of the
COM2B1:0 bits are set, the OC2B output overrides the normal port functionality of the I/O
pin it is connected to. However, note that the Data Direction Register (DDR) bit correspond-
ing to the OC2B pin must be set in order to enable the output driver.
When OC2B is connected to the pin, the function of the COM2B1:0 bits depends on the
WGM22:0 bit setting.
bits are set to a normal or CTC mode (non-PWM).
0
0
1
1
0
0
1
1
0
0
1
1
1. A special case occurs when OCR2A equals TOP and COM2A1 is set. In this case, the Com-
1. A special case occurs when OCR2B equals TOP and COM2B1 is set. In this case, the Com-
pare Match is ignored, but the set or clear is done at TOP. See
page 171
pare Match is ignored, but the set or clear is done at TOP. See
page 171
shows the COM2A1:0 bit functionality when the WGM22:0 bits are set to phase cor-
shows the COM2B1:0 bit functionality when the WGM22:0 bits are set to fast PWM
Compare Output Mode, Phase Correct PWM Mode
Compare Output Mode, non-PWM Mode
Compare Output Mode, Fast PWM Mode
COM2A0
COM2B0
COM2B0
for more details.
for more details.
0
1
0
1
0
1
0
1
0
1
0
1
Table 6-61
Description
Normal port operation, OC2A disconnected.
WGM22 = 0: Normal Port Operation, OC2A Disconnected.
WGM22 = 1: Toggle OC2A on Compare Match.
Clear OC2A on Compare Match when up-counting. Set OC2A on
Compare Match when down-counting.
Set OC2A on Compare Match when up-counting. Clear OC2A on
Compare Match when down-counting.
Normal port operation, OC2B disconnected.
Toggle OC2B on Compare Match
Clear OC2B on Compare Match
Set OC2B on Compare Match
Description
Normal port operation, OC2B disconnected.
Reserved
Clear OC2B on Compare Match, set OC2B at TOP
Set OC2B on Compare Match, clear OC2B at TOP
Description
shows the COM2B1:0 bit functionality when the WGM22:0
(1)
ATA6612/ATA6613
(1)
“Phase Correct PWM Mode” on
“Phase Correct PWM Mode” on
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