Sundance-spas ST201 Uživatelský manuál stáhnout pdf (Strana 85)

Sundance Technology ST201 PRELIMINARY draft 2

EXPROMDATA

Class....................I/O Registers, External Interface Control

Base Address ......IoBaseAddress register value

Address Offset.....0x44

Access Mode.......Read/Write

Width ...................8 bits

ExpRomData is the data port for performing direct I/O byte-wide accesses of the Expansion ROM. A read

of ExpRomData returns the ROM byte value from the location specified by ExpRomAddr. A write to

ExpRomData causes the write data to be programmed into the ROM location specified by ExpRomAddr.

Note: The Atmel EPROM devices supported by ST201 must be programmed in 64-byte pages. Refer to

the Atmel Flash Memory Device data book for information on programming EPROMs.

BIT BIT NAME BIT DESCRIPTION

15..0 ExpRomData Data read from, or to be written to, expansion ROM.

1 2 ... 80 81 82 83 84 85 86 87 88 89 90 ... 144 145

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Sundance-spas ST201 Uživatelský manuál Strana 85