Datasheet

174
ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]
8271E–AVR–07/2012
Prescaling
Down-Counter
/2
UBRRn
/4 /2
foscn
UBRRn+1
Sync
Register
OSC
XCKn
Pin
txclk
U2Xn
UMSELn
DDR_XCKn
0
1
0
1
xcki
xcko
DDR_XCKn
rxclk
0
1
1
0
Edge
Detector
UCPOLn