PC312XDP512F0CFVR datasheet(625/1348 Pages) FREESCALE

Part #	PC312XDP512F0CFVR

Description	HCS12X Microcontrollers

PDF	1348 Pages

Scroll/Zoom	100%

Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

Logo

625 / 1348 page

Chapter 17 Memory Mapping Control (S12XMMCV2)

MC9S12XDP512 Data Sheet, Rev. 2.21

Freescale Semiconductor

625

Figure 17-12. 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 = $00.

The reset value of $FD ensures that there is a linear RAM space available between addresses $1000 and

$3FFF out of reset.

The ﬁxed 4K page from $2000–$2FFF of RAM is equivalent to page 254 (page number $FE).

The ﬁxed 4K page from $3000–$3FFF of RAM is equivalent to page 255 (page number $FF).

Table 17-11. 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 Datasheet(PDF) 625 Page - Freescale Semiconductor, Inc