Atmel AVR XMEGA AU series - Page 403

403
8331B–AVR–03/12
Atmel AVR XMEGA AU
30.9.3 CTRLA – Control register A
• Bit 7:2 – 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 – AC1OUT: Analog Comparator 1 Output
Setting this bit makes the output of AC1 available on pin 6 of the port.
• Bit 0 – AC0OUT: Analog Comparator 0 Output
Setting this bit makes the output of AC0 available on pin 7 of the port.
30.9.4 CTRLB – Control register B
• Bit 7:6 – 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 5:0 – SCALEFAC[5:0]: Voltage Scaling Factor
These bits define the scaling factor for the Vcc voltage scaler. The input to the analog compara-
tor, V
SCALE
, is:
30.9.5 WINCTRL – Window Function Control register
• Bit 7:5 – 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 4 – WEN: Window Mode Enable
Setting this bit enables the analog comparator window mode.
Bit 76543210
+0x04 – – – – – – AC1OUT AC0OUT CTRLA
Read/WriteRRRRRRR/WR/W
Initial Value 0 0 0 0 0 0 0 0
Bit 76543210
+0x05 – – SCALEFAC[5:0] CTRLB
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Initial Value00000000
V
SCALE
V
CC
SCALEFAC 1+()⋅
64
------------------------------------------------------------ -=
Bit 76543210
+0x06 – – – WEN WINTMODE[1:0] WINTLVL[1:0] WINCTRL
Read/Write R R R R/W R/W R/W R/W R/W
Initial Value 0 0 0 0 0 0 0 0