ARM CM940T 4.3.6CM_LOCK (0x10000014)

Programmer’s Reference

4.3.6CM_LOCK (0x10000014)

The core module lock register (CM_LOCK) is a read/write register that is used to control access to the CM_OSC register, allowing it to be locked and unlocked. This mechanism prevents the CM_OSC register from being overwritten accidently.

31	17	16	15	0
Reserved		LOCKED		LOCKVAL

Table 4-7describes the core module lock register bits.

				Table 4-7 CM_LOCK register

Bits	Name	Access	Function

16	LOCKED	Read	This bit indicates if the CM_OSC register is
			locked or unlocked:
			0	= unlocked
			1	= locked.

15:0	LOCKVAL	Read/write	Write the value 0x0000A05F to this register
			to enable write accesses to the CM_OSC
			register.

Write any other value to this register to lock the CM_OSC register.

ARM DUI 0125A

4-13