9ZX21501B Datasheet, PDF (12/16 Pages) Integrated Device Technology – 15-Output Differential Zbuffer for PCIe Gen2/3 and QPI

9ZX21501B
15-Output Differential Zbuffer for PCIe Gen2/3 and QPI
SMBusTable: Vendor & Revision ID Register
Byte 5 Pin #
Name
Bit 7
-
RID3
Bit 6
-
RID2
Bit 5
-
RID1
Bit 4
-
RID0
Bit 3
-
VID3
Bit 2
-
VID2
Bit 1
-
VID1
Bit 0
-
VID0
Control Function
REVISION ID
VENDOR ID
Type
R
R
R
R
R
R
R
R
0
1
B rev = 0001
C rev = 0010
-
-
-
-
-
-
-
-
Default
X
X
X
X
0
0
0
1
SMBusTable: DEVICE ID
Byte 6 Pin #
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
Name
Control Function
Device ID 7 (MSB)
Device ID 6
Device ID 5
Device ID 4
Device ID 3
Device ID 2
Device ID 1
Device ID 0
Type
R
R
R
R
R
R
R
R
0
1
Device ID is 219 decimal or
DB hex.
Default
1
1
0
1
1
0
1
1
SMBusTable: Byte Count Register
Byte 7 Pin #
Name
Bit 7
Bit 6
Bit 5
Bit 4
-
BC4
Bit 3
-
BC3
Bit 2
-
BC2
Bit 1
-
BC1
Bit 0
-
BC0
Control Function
Reserved
Reserved
Reserved
Writing to this register configures how
many bytes will be read back.
Type
0
1
RW
RW ^{Default value is 8 hex, so 9}
RW bytes (0 to 8) will be read back
RW
by default.
RW
Default
0
0
0
0
1
0
0
0
SMBusTable: Reserved Register
Byte 8 Pin #
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Control Function
Type
0
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
1
Default
0
0
0
0
0
0
0
0
IDT^® 15-Output Differential Zbuffer for PCIe Gen2/3 and QPI
12
1629C - 12/15/11