UPD78P4908 datasheet(21/66 Pages) RENESAS

Part #	UPD78P4908

Description	MOS INTEGRATED CIRCUIT

PDF	66 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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21 / 66 page

µPD78P4908

Data Sheet U11681EJ2V0DS00

5. INTERNAL MEMORY SIZE SELECT REGISTER (IMS)

This register enables the software to avoid using part of the internal memory. The IMS can be set to establish

the same memory mapping as used in mask ROM products that have different internal memory (ROM and RAM)

configurations.

The IMS is set using 8-bit memory operation instructions.

A RESET input sets the IMS to FFH.

Figure 5-1. Internal Memory Size Select Register (IMS)

The IMS is not contained in a mask ROM product (

µPD784907 or µPD784908). But the action is not affected if

the write command to the IMS is executed to the mask ROM product.

IMS

IMS7

IMS6

IMS5

IMS4

IMS3

IMS2

IMS1

IMS0

765

0FFFCH

Address

FFH

Reset value

R/W

IMS0-7

FFH

EEH

Other than

the above

Same as the

PD784908

Memory size

Same as the

PD784907

Not to be set

UPD78P4908 Datasheet(PDF) 21 Page - Renesas Technology Corp