Datasheet

Integrated I/O (IIO) Configuration Registers
436 Intel
®
Xeon
®
Processor E7-2800/4800/8800 v2 Product Family
Datasheet Volume Two: Functional Description, February 2014
14.8.27 VPPSTS
This register defines the status from PCA9555
14.8.28 VPPFREQ
43:0 RWS 0x0
vpp_enaddr:
Assigns the VPP address of the device on the VPP interface and assigns the
port address for the ports within the VPP device. There are more address bits
then root ports so assignment must be spread across VPP ports.
Addr Port Root Port
[43:41] [40] Port 3d
[39:37] [36] Port 3c
[35:33] [32] Port 3b
[31:29] [28] Port 3a
[27:25] [24] Port 2d
[23:21] [20] Port 2c
[19:17] [16] Port 2b
[15:13] [12] Port 2a
[11:9] [8] Unused
[7:5] [4] Unused
[3:1] [0] Port 0 (PCIe* mode only)
Type: CFG PortID: N/A
Bus: 0 Device: 5 Function: 2
Offset: 0xb0
Bit Attr Default Description
Type: CFG PortID: N/A
Bus: 0 Device: 5 Function: 2
Offset: 0xb8
Bit Attr Default Description
31:1 RV - Reserved.
0:0 RW1CS 0x0
vpp_error:
VPP Port error happened that is, an unexpected STOP of NACK was seen on
the VPP port
Type: CFG PortID: N/A
Bus: 0 Device: 5 Function: 2
Offset: 0xbc
Bit Attr Default Description
31:24 RWS 0x1e
vpp_tpf:
Pulse Filter should be set to 60 nS. The value used is dependent on the
internal clock frequency. In this case, internal clock frequency is 500 MHz, so
the default value represents 60 nS at that rate.
23:16 RWS 0x96
vpp_thd_data:
Hold time for Data is 300 nS. The default value is set to 300 nS when the
internal clock rate is 500 MHz.
15:12 RV - Reserved.