Emerson MVME2500 manual PLD Shutdown and Reset Control and Reset Reason Register, Autosh

Memory Maps and Registers

5.5.15 PLD Shutdown and Reset Control and Reset Reason Register

The MVME2500 provides an 8-bit register to execute the shutdown and reset commands. The board's reset reason is also included in this register.

Table 5-18 PLD Shutdown and Reset Control and Reset Reason Register

REG	PLD Shutdown and Reset Reason- 0xFFDF00FF
Bit	7	6	5	4	3	2	1	0
Field	AUTO_SH	Shutdown	Soft_RST	Clear_Cause	CPU_RESET	WD_TIME	LRSTO	Sft_RST
	DN_MASK					OUT
OPER	R/W	W	W	W	R
RESET	0	0	0	0	X	X	X	X

Field Description
AUTO_SHDN_MASK	Automatic Shutdown Mask
	1	- Auto Shutdown Mask Enable
	0	- Auto Shutdown Mask Disable

Note: Automatic shutdown is generated after 1 second whenever a power good signal de- asserts.

Shutdown	Board Shutdown Register
	1	- Shutdown Enable
	0	- Shutdown Disable

Note: If a board entered the shutdown state (by writing a '1' in this register), the chassis' power needs to be cycled to power up the board again.

Soft_RST	Board Soft Reset (self clearing)
	1	- Execute soft reset
	0	- No reset
Clear_Cause	Clear Reset Reason (self clearing)
	1	- Clear Reason
	0	- None

MVME2500 Installation and Use (6806800L01H) 95