Adds latest rouble data in paragraph 2, official exchange rate in paragraph 3, expands Sberbank's CFO quote in paragraphs 6,7

MOSCOW, July 29 (Reuters) - Russia's rouble fell further against the dollar and China's yuan on Tuesday, reacting to U.S. President Donald Trump's setting of a new, shorter deadline for Moscow to agree an end to the war in Ukraine.

The rouble was down 1.5% as of 1530 GMT at 82.44 to the dollar, its weakest level since May 12, according to data compiled by LSEG based on over-the-counter quotes.

The central bank set the official exchange rate for the dollar at 82.22 roubles on Tuesday, first time the official exchange rate climbed above 82 since mid-April.

The rouble has weakened for four consecutive sessions since July 24, losing 4.7% against the dollar. The central bank's 200-basis-point key rate cut to 18% on July 25 - its biggest decrease in over three years - has also contributed to the rouble's fall.

In a sign of his deepening frustration with Russian President Vladimir Putin over the war in Ukraine, Trump said on Monday he was giving Moscow 10 to 12 days to make progress toward ending the conflict or face consequences.

"In recent days, we have observed a trend of the dollar rising against the rouble. Of course, this is largely linked to geopolitical factors and the comments made by Donald Trump earlier," said Taras Skvortsov, CFO of Russia's largest lender Sberbank.

"Therefore, it is difficult to say whether this wave will develop into something more significant or come to a halt," he added.

Sberbank expects the rouble to weaken to about 90 per dollar towards the end of the year.

Against the Chinese yuan, the most traded foreign currency in Russia, the rouble weakened by 0.8% to 11.43.

(Reporting by Gleb Bryanski; Editing by Joe Baviern and Alistair Bell)

((gleb.bryanski@thomsonreuters.com;))