PDI1394L41 Datasheet, PDF (60/81 Pages) NXP Semiconductors – 1394 content protection AV link layer controller

Philips Semiconductors
1394 content protection AV link layer controller
Preliminary specification
PDI1394L41
13.2.9 Common Isochronous Receiver Packet Header Quadlet 1 (IRXHQ1) – Base Address: 0x044
This quadlet represents the last received header value when AV receiver is operating.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SID
DBS
FN QPC
SV00286
Reset Value 0x00000000
Bit 31..30:
R
E0: End of Header, F0: Format: Always set to 00 for first AV header quadlet.
Bit 29..24
R
SID: Source ID, contains the node address of the sender of the isochronous data.
Bit 23.16:
R
DBS: Size of the data blocks from which AV payload is constructed. The value 0 represents a length of 256 quadlets.
Bit 15..14:
R
FN (Fraction Number): The encoding for the number of data blocks into which each source packet has been divided
(00 = 1, 01 = 2, 10 = 4, 11 = 8) by the transmitter of the packet.
Bit 13..11:
R
QPC: Number of dummy quadlets appended to each source packet before it was divided into data blocks of the
specified size.
Bit 10:
R
SPH: Indicates that a CYCTM based time stamp is inserted before each application packet (25 bits specified in the
IEC 61883 International Standard).
13.2.10 Common Isochronous Receiver Packet Header Quadlet 2 (IRXHQ2) – Base Address: 0x048
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
FMT
FDF
SYT
SV00287
Reset Value 0x0000FFFF
Bit 31..30:
R
E1: End of Header, F1: Format: Should be set to 10 for second AV header quadlet.
Bit 29..24:
R
FMT: Value inserted in the Format field.
Bit 23..0:
R
FDF/SYT: If ‘‘EN FS” in Register IRXPKCTL (0x040) is set to ‘1’, then lower 16-bits are interpreted as SYT.
2000 Apr 15
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