ARM CM940T 4.3Core module registers

Programmer’s Reference

4.3Core module registers

The core module status and control registers allow the processor to determine its environment and to control some core module operations. The registers, listed in Table 4-2,are located at 0x10000000 and can only be accessed by the local processor.

Table 4-2 Core module status, control, and interrupt registers

Register Name	Address	Access	Description

CM_ID	0x10000000	Read	Core module identification register

CM_PROC	0x10000004	Read	Core module processor register

CM_OSC	0x10000008	Read/write	Core module oscillator values

CM_CTRL	0x1000000C	Read/write	Core module control

CM_STAT	0x10000010	Read	Core module status

CM_LOCK	0x10000014	Read/write	Core module lock

CM_SDRAM	0x10000020	Read/write	SDRAM status and control

CM_IRQ_STAT	0x10000040	Read	Core module IRQ status register

CM_IRQ_RSTAT	0x10000044	Read	Core module IRQ raw status register

CM_IRQ_ENSET	0x10000048	Read/write	Core module IRQ enable set register

CM_IRQ_ENCLR	0x1000004C	Write	Core module IRQ enable clear register

CM_SOFT_INTSET	0x10000050	Read/write	Core module software interrupt set

CM_SOFT_INTCLR 0x10000054		Write	Core module software interrupt clear

CM_FIQ_STAT	0x10000060	Read	Core module FIQ status register

CM_FIQ_RSTAT	0x10000064	Read	Core module FIQ raw status register

CM_FIQ_ENSET	0x10000068	Read/write	Core module FIQ enable set register

CM_FIQ_ENCLR	0x1000006C	Write	Core module FIR enable clear register

CM_SPD	0x10000100 to 0x100001FC	Read	SDRAM SPD memory

Note

All registers are 32-bits wide and do not support byte writes. Write operations must be wordwide. Bits marked as reserved in the following sections should be preserved using read-modify-write operations.

ARM DUI 0125A

4-7