S912XEQ384J3MALR Freescale Semiconductor, S912XEQ384J3MALR Datasheet - Page 203

Manufacturer Part Number

S912XEQ384J3MALR

S912XEQ Series 16 Bit 50 Mhz 384 KB Flash 24 KB Ram Microcontroller - LQFP-112

Manufacturer

Freescale Semiconductor

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).

Read: Anytime

Write: Anytime

These eight index bits are used to page 1 KByte blocks into the EEPROM page window located in the local

(CPU or BDM) memory map from address 0x0800 to address 0x0BFF (see

accessing up to 256 KByte of EEPROM (in the Global map) within the 64 KByte Local map. The

EEPROM page index register is effectively used to construct paged EEPROM addresses in the Local map

Freescale Semiconductor

Address: 0x0017

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.

EEPROM Page Index Register (EPAGE)

XGATE write access to this register during an CPU access which makes use

of this register could lead to unexpected results.

Figure 3-15. EEPROM Page Index Register (EPAGE)

MC9S12XE-Family Reference Manual Rev. 1.24

Table 3-14. RPAGE Field Descriptions

Chapter 3 Memory Mapping Control (S12XMMCV4)

3-16). This supports