HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 954

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 26
26.3.19 LCDC Control Register (LDCNTR)
LDCNTR specifies start and stop of display by the LCDC.
When 1s are written to the DON2 bit and the DON bit, the LCDC starts display. Turn on the LCD
module following the sequence set in the LDPMMR and LDCNTR. The sequence ends when the
LPS[1:0] value changes from B'00 to B'11. Do not make any action to the DON bit until the
sequence ends.
When 0 is written to the DON bit, the LCDC stops display. Turn off the LCD module following
the sequence set in the LDPMMR and LDCNTR. The sequence ends when the LPS[1:0] value
changes from B'11 to B'00. Do not make any action to the DON bit until the sequence ends.
Rev. 3.00 Jan. 18, 2008 Page 892 of 1458
REJ09B0033-0300
Bit
3
2
1
0
Bit
15 to 5 
4
Bit Name
OFFF3
OFFF2
OFFF1
OFFF0
Bit Name
DON2
LCD Controller (LCDC)
1
1
1
1
Initial Value
Initial Value
All 0
0
R/W
R/W
R/W
R/W
R/W
R/W
R
R/W
LCDC Power-Off Sequence Period
Set the period from stopping output of the display
data (LCD_DATA) and timing signals (LCD_FLM,
LCD_CL1, LCD_CL2, and LCD_M_DISP) to
LCD_VCPWC negation to in the power-off
sequence of the LCD module in frame units.
Specify to the value of (the period)-1.
This period is the (f) period in figures 26.4 to 26.7,
Power-Supply Control Sequence and States of the
LCD Module.
Description
Description
Reserved
These bits are always read as 0. The write value
should always be 0.
Display On 2
Specifies the start of the LCDC display operation.
0: LCDC is being operated or stopped
1: LCDC starts operation
When this bit is read, always read as 0. Write 1 to
this bit only when starting display. If a value other
than 0 is written when starting display, the
operation is not guaranteed. When 1 is written to,
it resumes automatically to 0. Accordingly, this bit
does not need to be cleared by writing 0.