ARM CM940T 4.3.4CM_CTRL (0x1000000C)

Programmer’s Reference

4.3.4CM_CTRL (0x1000000C)

The core module control register (CM_CTRL) is a read/write register that provides control of a number of user-configurable features of the core module.

31	4	3	2	1	0
Reserved		RESET	REMAP	nMBDET	LED

Table 4-5describes the core module control register bits.

			Table 4-5 CM_CTL register
Bits	Name	Access	Function
31:8	Reserved	Use read-modify-write to preserve value.
7:4	Reserved	Use read-modify-write to preserve value.
3	RESET	Write	This is used to reset the core module, the
			motherboard on which it is mounted, and any core
			modules in a stack. A reset is triggered by writing
			a 1. Reading this bit always returns a 0 allowing
			you to use read-modify-write operations without
			masking the RESET bit.
2	REMAP	Read/write	This only has affect when the core module is
			mounted onto a motherboard. When this is the
			case, and this bit is a 0, accesses to the first
			256KB (0x00000000 to 0x0003FFFF) of memory
			are redirected into the motherboard.
1	nMBDET	Read	This bit indicates whether or not the core module
			is mounted on a motherboard:
			0 = mounted on motherboard
			1 = standalone.
0	LED	Read/write	This bit controls the green MISC LED on the core
			module:
			0 = LED OFF
			1 = LED ON.

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