P912XDP512F0MPVR datasheet(638/1348 Pages) FREESCALE

部件名	P912XDP512F0MPVR

功能描述	HCS12X Microcontrollers

PDF	1348 Pages

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制造商	FREESCALE [Freescale Semiconductor, Inc]

网页	http://www.freescale.com

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638 / 1348 page

Chapter 17 Memory Mapping Control (S12XMMCV2)

MC9S12XDP512 Data Sheet, Rev. 2.21

638

Freescale Semiconductor

17.4.2.4

XGATE Memory Map Scheme

17.4.2.4.1

Expansion of the XGATE Local Address Map

The XGATE 64 Kbyte memory space allows access to internal resources only (Registers, RAM, and

FLASH). The 2 Kilobyte register address range is the same register address range as for the CPU and the

BDM module . XGATE can access the FLASH in single chip modes, even when the MCU is secured. In

expanded modes, XGATE can not access the FLASH when MCU is secured.

The local address of the XGATE RAM access is translated to the global RAM address range. The XGATE

shares the RAM resource with the CPU and the BDM module. The local address of the XGATE FLASH

access is translated to the global address as shown in Figure 17-24. For the implemented memory spaces

and addresses please refer to Table 1-4 and Table 1-5.

P912XDP512F0MPVR 数据表(PDF) 638 Page - Freescale Semiconductor, Inc