245μPD17062b3 b2 b1 b 00 0 IDCEN010Turns off the display.Turns on the display.(RF 31H)------------20.3 IDC ENABLE FLAGThe IDCEN (IDC enable) flag is manipulated to start IDC operations (turn on the display). The flag is mappedat the lowest bit (#0) of the register file at 31H.Table 20-2 IDCEN Flag(1) Cautions in turning on the display(a) The IDCEN flag must be set to 1 (begin displaying), when the vertical sync signal (Vsync) is high(vertical flyback time: Vsync = low level) after the IDCDMAEN flag (RF, at 00H, #1) is turned on.(b) Do not write data to VRAM, when the IDCEN flag is 1 (display turned on).Sample programSET1 IDCDMAEN ; Sets the DMA mode.CLR1 IDCEN ; If the display is on when VRAM data is to be specified,; reset the IDCEN (turn off the display).Sets data in VRAM. ; Sets VRAM data.LOOPSKF1 INTVSYN ; Makes sure Vsync = low level, and sets the IDCEN.BR LOOPSET1 IDCEN ; Turns on the display.------
