Specifications

Micrel, Inc.
KSZ8895MQ/RQ/FMQ
Advanced Control Registers (Continued)
Address Name Description Mode Default
0 Port 1 Interrupt Status
1, Port 1 interrupt request
0, normal
Note: This bit is set by Port 1 link change. Write a
“1” to clear this bit
RO 0
Register 125 (0x7D): Interrupt Mask Register
7–5 Reserved Reserved. RO 000
4 Port 5 Interrupt Mask
1, Enable Port 5 interrupt.
0, normal
R/W 0
3 Port 4 Interrupt Mask
1, Enable Port 4 interrupt.
0, normal
R/W 0
2 Port 3 Interrupt Mask
1, Enable Port 3 interrupt.
0, normal
R/W 0
1 Port 2 Interrupt Mask
1, Enable Port 2 interrupt.
0, normal
R/W 0
0 Port 1 Interrupt Mask
1, Enable Port 1 interrupt.
0, normal
R/W 0
The registers 128, 129 can be used to map from 802.1p priority field 0-7 to switch’s four priority queues 0-3, 0x3 is
highest priority queues as priority 3, 0x0 is lowest priority queues as priority 0.
Address Name Description Mode Default
Register 128 (0x80): Global Control 12
7–6 Tag_0x3
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x3.
R/W 0x1
5–4 Tag_0x2
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x2.
R/W 0x1
3–2 Tag_0x1
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x1.
R/W 0x0
1–0 Tag_0x0
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x0.
R/W 0x0
Register 129 (0x81): Global Control 13
7–6 Tag_0x7
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x7.
R/W 0x3
5–4 Tag_0x6
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x6.
R/W 0x3
3–2 Tag_0x5
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x5.
R/W 0x2
1–0 Tag_0x4
IEEE 802.1p mapping. The value in this field is
used as the frame’s priority when its IEEE 802.1p
tag has a value of 0x4.
R/W 0x2
March 12, 2014
76
Revision 1.7