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UPD17062 Scheda tecnica(PDF) 59 Page - Renesas Technology Corp

Il numero della parte UPD17062
Spiegazioni elettronici  MOS INTEGRATED CIRCUIT
PDF  298 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

UPD17062 Scheda tecnica(HTML) 59 Page - Renesas Technology Corp

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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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