ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 466

• Manufacturer Part Number: ALXD800EEXJ2VD
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ALXD800EEXJ2VD

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

6.9.5.2
Ancillary packets are received during vertical and/or hori-
zontal blanking. The ancillary packet has a 6-byte header
of 00-FF-FF-DID-SDID-NN. The first three bytes are the
pre-amble. The DID and SDID bytes are the data identifier
and the secondary data identifier bytes. The NN byte is the
data count and specifies the length of the ancillary data
block in DWORDs (4-byte blocks). The entire ancillary data
packet is stored to memory, including all 6 bytes of pream-
ble/header. See Section 6.9.10 on page 472 for further
466
Ancillary Packets
VID[7:0]
VID[7:0]
VID[15:8]
33234C
6 Byte Ancillary Header
6 Byte Ancillary Header
0
0
X X
0
0
F
F
F
F
F
F
F
F
X X
D
D
D
D D
I
Figure 6-42. Ancillary Data Packets
I
First DWORD
S
I
S
D
X X d1 d3 d5 d7
I
DWORD
8/10-BIT ANCILLARY PACKET
First
16-BIT ANCILLARY PACKET
N
N
N
N
d0 d2 d4 d6
D
D
I
D
D
I
d0 d1 d2
explanation. There is no restriction on the code in the data
section of the packet (codes 00 and FF are allowed) The
SAV/EAV packet preamble detection circuitry is disabled
during the reception of these NN blocks of data to allow
reception of 00, FF codes. The active data is received on
bits [7:0] in 8-bit mode, [9:0] in 10-bit mode and on [15:0] in
16-bit mode.
A sample ancillary packet is shown in Figure 6-42.
d
d
d
d
d
d
d
d
d
Last DWORD
d
d
d
check sum
d
AMD Geode™ LX Processors Data Book
d
d
DWORD
check
Last
d
d
fill byte
sum
fill byte
Video Input Port