![](http://datasheet.mmic.net.cn/390000/TSB42AA4I_datasheet_16839080/TSB42AA4I_164.png)
667
0x258 0x270 0x288 0x2A0 0x2B8 0x2D0 0x2E8 0x300 (Continued)
TXDP(N)H1 – When associated buffer is configured for stream type 410 (all Video modes)
DEFAULT CONFIGURATION FOR BUFFER 0
BIT
NAME
TYPE
RESET
FUNCTION
15:14
FN
RU
DEP
Fraction number – This field indicates the number of 1394 packets
required to send one complete video cell. This field represents the FN
value provided in the CIP header of the transmitted packet. The encoding
of this field is used as follows:
00 – Cell is not divided
01 – Cell is divided into two data blocks
10 – Cell is divided into four data blocks
11 – Cell is divided into eight data blocks
The default values for individual buffers is as follows;
Buffer#
Value
0
3
17
0
13:11
QPC
R0
0
Quadlet padding count – This field represents the QPC value provided in
the CIP header of the transmitted packet.
10
SPH
RW
RU
DEP
Source packet header – This field represents the SPH value provided in
the CIP header of the transmitted packet. The buffer dependent default
values are as follows:
Buffer#
Value
0
1
17
0
9:8
RSVD
R0
0
Reserved – A write to this location has no effect. A read returns 0s.
7:0
DBCC
RU
0
Data block continuity counter – This field represents the countinuity
counter value provided in the CIP header of the transmitted packet.
Read only if SPH_NEWCELL is activated.
0x25C 0x274 0x28C 0x2A4 0x2BC 0x2D4 0x2EC 0x304
TXDP(N)H2 – When associated buffer is configured for stream type 1 (ASYNC)
DEFAULT CONFIGURATION FOR BUFFER 4
BIT
NAME
TYPE
RESET
FUNCTION
31:0
DESTOFFLOW
RW
0
Destination offset low This field contains the lower 32 bits of the
destination offset to be provided in the header of the transmitted packet.
TXDP(N)H2 – When associated buffer is configured for stream types: 4 6 (DirecTV 130, DirecTV 140, DVB)
DEFAULT CONFIGURATION FOR BUFFER 0
BIT
NAME
TYPE
RESET
FUNCTION
31
RSVD
R1
0
Reserved – A write to this location has no effect. A read returns 1.
30
RSVD
R0
0
Reserved – A write to this location has no effect. A read returns 0.
29:24
FMT
RU
DEP
Format type – This field contains the format type value provided with the
CIP1 header of the transmitted packet. The default values for individual
buffers is as follows;
Buffer#
Value
0
20
17
00
23:0
FDF
RW
0
Format dependent field This field contains the format dependent
value. Bit 23 represents the TSF (time shift flag). Bits 220 are all zeros.