hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 350

• Manufacturer Part Number: hd66100
• Description: H8/3867 Series
• Manufacturer: Renesas Electronics Corporation.

Bit 4: Display data control (DISP)
Bit 4 specifies whether the LCD RAM contents are displayed or blank data is displayed regardless
of the LCD RAM contents.
Bit 4
DISP
0
1
Bits 3 to 0: Frame frequency select 3 to 0 (CKS3 to CKS0)
Bits 3 to 0 select the operating clock and the frame frequency. In subactive mode, watch mode,
and subsleep mode, the system clock (ø) is halted, and therefore display operations are not
performed if one of the clocks from ø/2 to ø/256 is selected. If LCD display is required in these
modes, øw, øw/2, or øw/4 must be selected as the operating clock.
Bit 3
CKS3
0
0
0
1
1
1
1
1
1
1
1
Notes: 1. This is the frame frequency in active (medium-speed, øosc/16) mode when ø = 2 MHz.
2. When 1/3 duty is selected, the frame frequency is 4/3 times the value shown.
3. This is the frame frequency when øw = 32.768 kHz.
Bit 2
CKS2
*
*
*
0
0
0
0
1
1
1
1
Description
Blank data is displayed
LCD RAM data is display
Bit 1
CKS1
0
0
1
0
0
1
1
0
0
1
1
Bit 0
CKS0
0
1
*
0
1
0
1
0
1
0
1
Operating Clock
øw
øw/2
øw/4
ø/2
ø/4
ø/8
ø/16
ø/32
ø/64
ø/128
ø/256
ø = 2 MHz
128 Hz
64 Hz
32 Hz
—
977 Hz
488 Hz
244 Hz
122 Hz
61 Hz
30.5 Hz
—
*3
*3
*3
Frame Frequency
(initial value)
ø = 250 kHz
244 Hz
122 Hz
61 Hz
30.5 Hz
—
—
—
—
(initial value)
*: Don’t care
*2
*1
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