GS1501 Gennum Corporation, GS1501 Datasheet - Page 10

• Manufacturer Part Number: GS1501
• Description: Hd-linx (tm) THDTV Serial Digital Formatter With Anc Fifos
• Manufacturer: Gennum Corporation

may be inserted during the HANC period. These data
should be supplied into the FIFO during the active video
period. Once all words have been read from the FIFO, the
FF_STA signal will be set to 001.
TABLE 1: FIFO Status Indicator
GENNUM CORPORATION
FF_STA[2:0]
DATA_IN[19:0]
000
001
010
011
100
101
110
111
PCLK_IN
RSTLN
ERROR flag; FIFO is under run
FIFO is empty
FIFO is almost empty; ≤ 32 bytes filled
FIFO is ready
FIFO is half full
FIFO is almost full; ≥ 992 bytes filled
FIFO is full
ERROR flag; FIFO is over run
DATA_OUT
PCLK_IN
DATA_IN
n Frames
DESCRIPTION
DATA
Fig. 1 Synchronous I/O Time
Fig. 2 RSTLN Timing
t
SU
DATA
t
IH
10
SYNCHRONIZED TO
3FF
3.3.5 FIFO External Reset
In external FIFO control mode, the internal FIFO address
pointers are reset to zero (0) using FFRST. A recommended
external reset process is shown in Figure 15.
PCLK_IN
PCLK_IN
PCLK_IN
W_CLK
W_CLK
W_CLK
W_CLK
DATA
-
000
EAV For Line#1
Transistion From Low To High Can Happen at Any Point
000
DATA
DATA
t
OH
t
(EAV ID)
OD
XYZ
DATA
DATA
LN
Line#1 Inserted
0
Here
LN
1
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