UPD178024 datasheet(20/58 Pages) RENESAS

No. de pieza	UPD178024

Descripción Electrónicos	MOS INTEGRATED CIRCUIT

PDF	58 Pages

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Fabricante Electrónico	RENESAS [Renesas Technology Corp]

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µPD178023, 178024

Data Sheet U14126EJ2V0DS00

2.2 Internal Extension RAM Size Select Register (IXS)

The internal extension RAM size select register (IXS) sets the internal extension RAM capacity.

Use the

µPD178023, µPD178024 with the initial value (0CH).

Use an 8-bit memory manipulation instruction to set the IXS.

This register is set to 0CH at reset.

Caution Do not assign a value other than that the initial value.

Figure 2-3. Format of Internal Extension RAM Size Select Register (IXS)

IXRAM4 IXRAM3 IXRAM2 IXRAM1 IXRAM0

Selects Internal Extension RAM Capacity

01100

0 byte

Others

Setting prohibited

Table 2-2 indicates the setting of IXS.

Table 2-2. Set Value of Internal Extension RAM Size Select Register

Targeted Model

Set Value of IXS

µPD178023, 178024

0CH

IXRAM4

IXRAM3

IXRAM2

IXRAM1

IXRAM0

Symbol

IXS

At reset

0CH

R/W

Address

FFF4H

UPD178024 Datasheet(PDF) 20 Page - Renesas Technology Corp