PXD10RM Datasheet, PDF (1125/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Chapter 34
Static RAM (SRAM)
34.1 Introduction
The PXD10 family offers 24 KB or 48 KB of general purpose system SRAM (with ECC protection). Some
family members also include 160 KB of graphics SRAM (without ECC protection). Details of the SRAM
areas and their features for each family member are shown in Table 34-1.
Table 34-1. SRAM memory map
Address range
Size [KB]
0x40000000 0x40001FFF
8
0x40002000 0x40005FFF
16
Yes Yes
Yes Yes
0x40006000 0x4000BFFF
24
No Yes
0x4000C000 0x5FFFFFFF 524240 —
—
0x60000000 0x60027FFF
160
No
No
0x60028000 0x7FFFFFFF 524128 —
—
Region
Yes SRAM (ECC protection, standby support)
Yes SRAM (ECC protection, standby support
is programmable)
Yes SRAM (ECC protection, standby support
is programmable)
— Reserved
Yes Graphics SRAM (no ECC protection, no
standby support)
— Reserved
34.2 General-purpose SRAM
The general-purpose SRAM comprises 8 KB of standby SRAM plus 16 KB or 40 KB of SRAM that may
or may not be enabled in standby mode. The SRAM provides the following features:
• SRAM can be read/written from any bus master
• Byte, halfword and word addressable
• ECC protected with single-bit correction and double-bit detection
34.3 Graphics SRAM
The 160 KB of graphics SRAM has no ECC protection and is not powered during standby mode.
34.4 Low power configuration
In order to reduce leakage, only an 8 KB portion of the SRAM remains powered by default during standby
mode.
Freescale Semiconductor
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
34-1