PC312XDP512F0CFVR datasheet(665/1348 Pages) FREESCALE

部品番号	PC312XDP512F0CFVR

部品情報	HCS12X Microcontrollers

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メーカー	FREESCALE [Freescale Semiconductor, Inc]

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Chapter 18 Memory Mapping Control (S12XMMCV3)

MC9S12XDP512 Data Sheet, Rev. 2.21

Freescale Semiconductor

665

Figure 18-12. RPAGE Address Mapping

NOTE

Because RAM page 0 has the same global address as the register space, it is

possible to write to registers through the RAM space when RPAGE = 0x00.

The reset value of 0xFD ensures that there is a linear RAM space available between addresses 0x1000 and

0x3FFF out of reset.

The ﬁxed 4K page from 0x2000–0x2FFF of RAM is equivalent to page 254 (page number 0xFE).

The ﬁxed 4K page from 0x3000–0x3FFF of RAM is equivalent to page 255 (page number 0xFF).

Table 18-12. RPAGE Field Descriptions

Field

Description

7–0

RP[7:0]

RAM Page Index Bits 7–0 — These page index bits are used to select which of the 256 RAM array pages is to

be accessed in the RAM Page Window.

Bit18

Bit0

Bit11

Address [11:0]

RPAGE Register [7:0]

Global Address [22:0]

Bit12

Bit19

Address: CPU Local Address

or BDM Local Address

PC312XDP512F0CFVR データシート(PDF) 665 Page - Freescale Semiconductor, Inc