molex SST-DN4-PCU - Hostirq Register; Ledreg Register

SST-DN4-PCU Hardware Reference Guide
36 Hardware Register Details
©2009 Molex Inc.Automation & Electrical Products, Integrated Products Division
Document Edition: 1.0, Document #: 715-0101, Template Edition: 1.1, Template #: QMS-06-045
Use, duplication or disclosure of this document or any of the information contained herein is subject to the restrictions on page ii of this document.
3.4.6 HostIrq Register
The Irq function is supported in the PCI interface so the Irq support in this register is reserved.
Table 15: HostIrq Register Settings
Bit 7 6 5 4 3 2 1 0
Name Platform Platform ID reserved reserved reserved reserved
Read/Write R/W R R R R R R R
Reset 0 0 0 0 0 0 0 0
The DN4 platform shall support DN3/DN4 hardware platform detection in the HostIrq register as
follows:
1) Writing 1000b in bits 7-4 shall cause bits 7-4 to subsequently read a platform. This code shall
only be non-zero for DN4 and above. The initial write of 1000b to bits 7-4 is to ensure old
drivers will not see a value in these bits that it is not expecting, DN, DNP and DN3 expect 0000b
and writing these bits did nothing.
2) DN4 platform shall read 0001b only if the previous access to the cards registers wrote “1” to
the Platform bit. When the Platform is set then the next access, read or write, will clear the
Platform bit.
3.4.7 LedReg Register
This register reflects the state of the channel’s LEDs, allowing host software to monitor the
LEDs and display them on-screen.
Table 16: LedReg Register Settings
PWR HLTH COMM
Bit 7 6 5 4 3 2 1 0
Name Reserved PwrRed PwrGrn HealthRed HealthGrn CommRed CommGrn
Read/Write R R R R R R R R
Reset 0 0 0 0 0 0 0 0