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SL811HS Embedded USB Host/Slave Controller

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<strong>SL811HS</strong><br />

Bus Interface Timing Requirements<br />

I/O Write Cycle<br />

nWR<br />

twr<br />

twrhigh<br />

A0<br />

D0-D7<br />

twasu<br />

twdsu<br />

Register or Memory<br />

Address<br />

twahld<br />

twdhld<br />

twdsu<br />

DATA<br />

twdhld<br />

twcsu<br />

twshld<br />

nCS<br />

Tcscs See Note.<br />

I/O Write Cycle to Register or Memory Buffer<br />

Parameter Description Min. Typ. Max.<br />

t WR Write pulse width 85 ns<br />

t WCSU Chip select set-up to nWR LOW 0 ns<br />

t WSHLD<br />

Chip select hold time<br />

0 ns<br />

After nWR HIGH<br />

t WASU A0 address set-up time 85 ns<br />

t WAHLD A0 address hold time 10 ns<br />

t WDSU Data to Write HIGH set-up time 85 ns<br />

t WDHLD Data hold time after Write HIGH 5 ns<br />

t CSCS nCS inactive to nCS* asserted 85 ns<br />

t WRHIGH NWR HIGH 85 ns<br />

Note nCS an be held LOW for multiple Write cycles provided nWR is cycled. Write Cycle Time for Auto Inc Mode Writes is 170<br />

ns minimum.<br />

Document 38-08008 Rev. *D Page 26 of 32<br />

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