Registers
PCVisionplus
Hardware Reference
3–11
Rev 02; February 8, 2002
3.1.5 Revision Identification (RID) R-O
0
7
Adress offset 0x8
REVID7
REVID6
REVID5
REVID4
REVID3
REVID2
REVID1
REVID0
REVID
This register contains a revision identification number assigned by Coreco Imaging, Inc. which will reflect the revi-
sion of the PCVisionplus. This register is boot-loaded at power-up and is read-only.
3.1.5.1 Revision Field (REVID) R-O
The revision level will change with each functional change to the PCVisionplus hardware design, allowing the
software to identify the revision and the corresponding functionality.
3.1.6 Class Code (CLCD) R-O
0
7
Address offset 0x9
0
0
0
0
0
0
0
0
8
15
0
0
0
0
0
0
0
0
CLASSCODE
16
23
0
0
0
0
0
1
0
0
This register contains a class code for the PCVisionplus as defined by PCI SIG. The PCVisionplus is defined as a
Multimedia Device (Base Class = 0x04) of type Video (Sub-Class =0x00). This register is boot-loaded at power-up
and is read-only.
3.1.7 Cache Line Size (CALN) R-O
0
7
Address offset 0xC
0
0
0
0
0
0
0
0
CALN
This configuration register does not apply to the PCVisionplus and is hard-wired to zero. This register is read only.
3.1.8 Latency Timer (LAT) R/W
0
7
Address offset 0xD
LAT4
LAT3
LAT2
LAT1
LAT0
0
0
0
LAT
This register defines the number of PCI clocks a bus master cycle will be guaranteed. Setting this register will guar-
antee the PCVisionplus will be granted the bus during bus master operations for the set amount of time. The value set
by LAT(4–0) = # of clocks x 8. The three lsbs (least significant bits) are read only. This register is boot-loaded at
power-up to a value of zero.
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