Renesas SH7781 - Manual (Page 991)

19. Display Unit (DU)
Rev.1.00 Jan. 10, 2008 Page 961 of 1658
REJ09B0261-0100
19.5.3 Scan Method
The scan method can be selected from among non-interlaced mode, interlaced sync mode, and
interlaced sync & video mode. The mode is selected using the SCM bit in DSYSR.
• Non-interlaced mode
In this scan method, one frame consists of a single field.
• Interlaced sync mode
In this scan method, one frame consists of two fields. The two fields are an even field and an
odd field, displaying the same data.
• Interlaced sync & video mode
In this scan method, one frame consists of two fields. The two fields are an even field and an
odd field, displaying different data.
The ODEV bit in DSMR is used to set the display order of fields in interlaced sync mode and in
interlaced sync & video mode. When the ODEV bit is 0, the display order for one frame is odd
field, then even field; when the ODEV bit is 1, the order for one frame is even field, then odd
field.
When in master mode, high level is output from the ODDF pin during even field display, and low
level is output during odd field display. When in TV sync mode, high level is input to the ODDF
pin to cause display of the even field, and low level is input to cause display of the odd field.
Note: When non-interlaced mode is selected in TV sync mode, the ODDF pin should be fixed at
low level or high level.