hd64338342hw Renesas Electronics Corporation., hd64338342hw Datasheet - Page 473

• Manufacturer Part Number: hd64338342hw
• Description: Renesas 8-bit Single-chip Microcomputer H8 Family/h8/300l Super Low Power 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 ( ) is halted, and therefore display operations are not
performed if one of the clocks from /2 to /256 is selected. If LCD display is required in these
modes, w, w/2, or w/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, osc/16) mode when
2. When 1/3 duty is selected, the frame frequency is 4/3 times the value shown.
3. This is the frame frequency when w = 32.768 kHz.
Bit 2
CKS2
*
*
*
0
0
0
0
1
1
1
1
Blank data is displayed
LCD RAM data is display
Description
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
w
w/2
w/4
/2
/4
/8
/16
/32
/64
/128
/256
Rev. 6.00 Aug 04, 2006 page 437 of 680
Frame Frequency *
128 Hz *
64 Hz *
32 Hz *
—
977 Hz
488 Hz
244 Hz
122 Hz
61 Hz
30.5 Hz
—
Section 13 LCD Controller/Driver
= 2 MHz
3
3
3
(initial value)
REJ09B0145-0600
244 Hz
122 Hz
61 Hz
30.5 Hz
—
—
—
—
= 250 kHz *
2
(initial value)
*: Don’t care
= 2 MHz.
1