SMSC COM20020 manual Address Pointer High Register, Address Pointer Low Register

Table 7 - Address Pointer High Register

BIT	BIT NAME	SYMBOL	DESCRIPTION
7	Read Data	RDDATA	This bit tells the COM20020 whether the following access
			will be a read or write. A logic "1" prepares the device for
			a read, a logic "0" prepares it for a write.
6	Auto Increment	AUTOINC	This bit controls whether the address pointer will
			increment automatically. A logic "1" on this bit allows
			automatic increment of the pointer after each access,
			while a logic "0" disables this function. Please refer to
			the Sequential Access Memory section for further detail.
5-3	(reserved)		These bits are undefined.
2-0	Address 10-8	A10-A8	These bits hold the upper three address bits which
			provide addresses to RAM.

Table 8 - Address Pointer Low Register

BIT	BIT NAME	SYMBOL	DESCRIPTION
7-0	Address 7-0	A7-A0	These bits hold the lower 8 address bits which provide
			the addresses to RAM.

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