UPD17062 datasheet(59/298 Pages) RENESAS

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UPD17062 データシート(PDF) 59 Page - Renesas Technology Corp

部品番号	UPD17062

部品情報	MOS INTEGRATED CIRCUIT

PDF	298 Pages

Scroll/Zoom	100%

メーカー	RENESAS [Renesas Technology Corp]

ホームページ	http://www.renesas.com

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59 / 298 page

µPD17062

8.5

INDEX REGISTER (IX) AND DATA MEMORY ROW ADDRESS POINTER (MP)

8.5.1

Configuration of Index Register and Data Memory Row Address Pointer

As shown in Fig. 8-1, the index register consists of 11 bits, including the three low-order bits, of 7AH (IXH)

of the system register, 7BH, and 7CH (IXM, IXL). The index register is used to indirectly specify a data memory

address.

The data memory row address pointer consists of 7 bits, including the three low-order bits of 7AH (MPH)

and 7BH (MPL).

This means that the seven high-order bits of the index register and data memory row address pointer are

shared.

The four high-order bits of the index register, i.e., the four high-order bits of the data memory row address

pointer (7AH b2-b0, 7BH b3), of

µPD17062 are fixed at 0.

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