Intel cPCI-7200 Manual do Utilizador descarregar pdf (Página 35)

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3.6 8254 Timer Registers (BASE + 0)

The 8254 timer/counter IC occupies 4 I/O address. Users can refer to Tundra's

or Intel's data sheet for a full description of the 8254 features. Download the

8254 data sheet from the following web site:

http://support.intel.com/support/controllers/peripheral/231164.htm or

http://www.tundra.com (for Tundra’s 82C54 datasheet).

Address Read Write

Base + 0 Counter 0 Counter 0

Base + 4 Counter 1 Counter 1

Base + 8 Counter 2 Counter 2

Base + C --- CLK Control CW0

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 70 71

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Intel cPCI-7200 Manual do Utilizador Página 35