Renesas SH7781 用户手册

19.   Display Unit (DU) 

Rev.1.00  Jan. 10, 2008  Page 870 of 1658 
REJ09B0261-0100 

 

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:

 

 

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.