Sundance Spas ST201 manual Expromdata

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

15..0

BIT NAME

ExpRomData

BIT DESCRIPTION

Data read from, or to be written to, expansion ROM.

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