Information

PCI Express Interface Controller

MPC8308 PowerQUICC II Pro Processor Reference Manual, Rev. 1

Freescale Semiconductor 14-47

14.4.4.17 PCI Express Slot Status Register

The PCI Express slot status register is shown in Figure 14-57.

Table 14-55 describes the PCI Express slot status register fields.

2 MRLSCE MRL sensor changed enable

1 PFDE Power fault detected enable

0 ABPE Attention button pressed enable

Offset 0x066 Access: Mixed

15 76543210

R — PDS MRLSS CC PDC MRLSC PFD ABP

w1c w1c w1c w1c w1c

Reset0000000001 0 00 0 00

Figure 14-57. PCI Express Slot Status Register

Table 14-55. PCI Express Slot Status Register Fields Description

Bits Name Description

15–7 — Reserved

6 PDS Presence detect state. Indicates whether a card is present in the slot.

0 Slot empty

1 Card is present

5 MRLSS MRL sensor state

0MRL closed

1 MRL open

4 CC Command completed

3 PDC Presence detect changed

2 MRLSC MRL sensor changed

1 PFD Power fault detected

0 ABP Attention button pressed

Table 14-54. PCI Express Slot Control Register Fields Description (continued)

Bits Name Description