* MSCI Asia-Pacific index up 0.25 pct, Nikkei flat
* Euro slips as Catalan vote results tip separatist win
* Overall impact of Catalan vote seen limited
TOKYO, Dec 22 (Reuters) - Asian stocks edged up on Friday on new data pointing to steady growth in the U.S. economy, while the euro slipped after a vote in Catalonia favored separatists wanting to break away from Spain.
MSCI's broadest index of Asia-Pacific shares outside Japan was 0.25 percent higher.
The region's equities took cues from Wall Street, after all three major indexes posted gains overnight on strength in bank and energy stocks and news the U.S. economy grew in the third quarter at its fastest pace in more than two years.
Supporting U.S. stocks this week, and by extension global equities, was the passage of $1.5 trillion tax-cutting bill through Congress.
Australian stocks advanced 0.4 percent, South Korea's KOSPI gained 0.15 percent and Japan's Nikkei stood little changed.
In currencies, the euro was down 0.25 percent to $1.1842 as preliminary results from regional votes on Thursday showed pro-independence parties in Catalonia keeping an absolute majority.
"Some speculators appeared to have sold the euro in thin trading," said Yukio Ishizuki, senior currency strategist at Daiwa Securities in Tokyo.
"The overall impact of the Catalan vote on the euro and the wider global markets is likely to be limited, however. Catalonia cannot become a sovereign state if no other country recognizes its independence. It won't even be able to have its own currency under such conditions."
The dollar was steady at 113.350 yen.
The dollar index against a basket of six major currencies was 0.15 percent higher at 93.425.
The benchmark 10-year Treasury yield was at 2.482 percent, having pulled back slightly from a nine-month peak above 2.500 percent scaled the previous day.
Treasury yields climbed earlier this week after Congress approved a U.S. tax code overhaul that was expected to lift economic growth and add at least $1 trillion to the national debt in 10 years.
U.S. crude futures slipped 0.35 percent to $58.16 per barrel.
The contracts had reached a nine-day peak of $58.38 overnight as OPEC started working on plans for an exit strategy from its deal to cut crude supplies, fueling hopes it would not end supply cuts abruptly. (Reporting by Shinichi Saoshiro; Editing by Eric Meijer)