NEC uPD72257, Preliminary User'S Manual

Page: 184 / 343

6.10.2.12 VInSTATUS - Video Input status register
This register summarizes all status information for the Video Input.
Access This register can be read in 32-bit units.
Address <VIn_Base> + 20
H
Initial Value 0000 0000 0000 0000 00XX XXXX XXXX 00XX
B
. This register is initialized by any
reset.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
R R R R R R R R R R R R R R R R
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 FFUSEDW[5:0]
VI
IDLE
FIELD
V
SYNC
H
SYNC
0 0
STAR
T2
PEND
STAR
T1
PEND
R R R R R R R R R R R
Bit Bit name Function
13 to 8 FFUSEDW[5:0] Number of words in FIFO
7 VIIDLE
Operation status of Video Input
0 capture operation active
1 idle
6 FIELD
Current status of the internal field signal
0 first field
1 second field
5 VSYNC
Current status of the internal VSYNC signal
0 not active
1 active
4 HSYNC
Current status of the internal HSYNC signal
0 not active
1 active
1 START2PEND
New address in VInSTARTADDR2 for second field pending
0 new VInSTARTADDR2 effective
1 new VInSTARTADDR2 not yet effective
0 START1PEND
New address in VInSTARTADDR1 for first field pending
0 new VInSTARTADDR1 effective
1 new VInSTARTADDR1 not yet effective
Chapter 6 Video Input (Ravin-M only)
184
Preliminary User's Manual S19203EE1V3UM00