Renesas SH7781 - Manual (Page 900)

19. Display Unit (DU)
Rev.1.00 Jan. 10, 2008 Page 870 of 1658
REJ09B0261-0100
19.3.15 Vertical Cycle Register (VCR)
The vertical cycle register (VCR) sets the vertical scan interval. The value is retained during
power-on reset and manual reset.
R/W:
Internal update:
R/W:
Internal update:
16 17 18 19 20 21 22 23 24 25 26 27 28 29 31 30 Bit:
Initial value:
R R R R R R R R R R R R R R R R
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
— — — — — — — — — — — — — — — —
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R R R R R R
O O O O O O O O O O
— — — — — — — — — — 0 0 0 0 0 0
VC — — — — — —
0 1 2 3 4 5 6 7 8 9 10 11 12 13 15 14 Bit:
Initial value:
Bit Bit Name
Initial
Value R/W Internal
Update Description
31 to 10
⎯ All
0 R
⎯ Reserved
These bits are always read as 0. The write value
should always be 0.
9 to 0 VC Undefined R/W Yes Vertical Cycle
The vertical scan interval, including the vertical
blanking interval, should be set in raster line
units.
When in TV sync mode, the EXVSYNC rising-
edge detection interval time should be set. If not
detected within the interval, the result is
reflected in the TVR flag in DSSR.