Artesyn ATCA-7480, Installation And Use Manual, Page: 143 / 330

Maps and Registers
ATCA-7480 Installation and Use (6806800T17A)
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5.1.12.5 OS Reset Source Register
The OS Reset Source Register stores the source of the most recent reset. It is similar to the BIOS
Reset Source Register. A “1” in the register bit indicates that the associated reset has occurred.
If more than one reset occurs from different sources without clearing the corresponding
register bits, one cannot determine the most recent reset source since more than one bit will
be set. The same will happen if two reset sources go active at the same time.
5.1.12.6 OS IPMC Watchdog Timeout Register
BIOS should never write to this register.
Table 5-57 OS Reset Source Register
Address Offset: 0x14
Bit Description Default Access
0 PWR_GOOD Payload Power-on reset
1: Reset occurred PWR_GOOD:1 LPC: r/w1c
IPMC: r
1 XDPx reset request (Any one of XDPx signal caused reset
1: Reset occurred PWR_GOOD:0 LPC: r/w1c
IPMC: r
2 PB_RST_ face plate push button reset
1: Reset occurred PWR_GOOD:0 LPC: r/w1c
IPMC: r
3 Reserved 0 r
4 RTM_PB_RST_ Reset key at RTM
1: Reset occurred PWR_GOOD:0 LPC: r/w1c
IPMC: r
5 Reserved 0 r
6 PCH_PLTRST_ reset
1: Reset occurred PWR_GOOD:0 LPC: r/w1c
IPMC: r
7 IPMC_RST_ REQ_ Payload Reset from IPMC.
1: Reset occurred PWR_GOOD:0 LPC: r/w1c
IPMC: r