Atmel XMEGA B, User Manual

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184 XMEGA B [DATASHEET]
8291B–AVR–01/2013
Table 14-4. Command selections.

Bit 1:0 – CMDEN[1:0]: Command Enable
These bits are used to indicate for which timer/counter the command (CMD) is valid.
Table 14-5. Command enable selections.
14.10.8 INTFLAGS – Interrupt Flag register

Bit 7:4 – LCMPxIF: Compare Channel x Interrupt Flag
The compare interrupt flag (LCMPxIF) is set on a compare match on the corresponding CMP channel.
For all modes of operation, LCMPxIF will be set when a compare match occurs between the count register (LCNT) and
the corresponding compare register (LCMPx). The LCMPxIF is automatically cleared when the corresponding interrupt
vector is executed. The flag can also be cleared by writing a one to its bit location.

Bit 3:2 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always write these bits to zero
when this register is written.

Bit 1 – HUNFIF: High-byte Timer Underflow Interrupt Flag
HUNFIF is set on a BOTTOM (underflow) condition. This flag is automatically cleared when the corresponding interrupt
vector is executed. The flag can also be cleared by writing a one to its bit location.
 Bit 0 – LUNFIF: Low-byte Timer Underflow Interrupt Flag
LUNFIF is set on a BOTTOM (underflow) condition. This flag is automatically cleared when the corresponding interrupt
vector is executed. The flag can also be cleared by writing a one to its bit location.
CMD Group Configuration Description
00 NONE None
01 — Reserved
10 RESTART Force restart
11 RESET Force hard reset (ignored if T/C is not in OFF state)
CMDEN Group Configuration Description
00 – Reserved
01 LOW Command valid for low-byte T/C
10 HIGH Command valid for high-byte T/C
11 BOTH Command valid for both low-byte and high-byte T/C
Bit 7 6 5 4 3 2 1 0
+0x0C
LCMPDIF LCMPCIF LCMPBIF LCMPAIF – – HUNFIF LUNFIF
Read/Write R/W R/W R/W R/W R R R/W R/W
Initial Value 0 0 0 0 0 0 0 0