h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 563

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Table 17.5 Output Levels (A Waveform)
17.4.3
In this LSI, the LCD controller/driver can be operated even in power-down modes. The operating
state of the LCD controller/driver in the power-down modes is summarized in table 17.6.
In subactive mode, watch mode, and subsleep mode, the system clock oscillator stops, and
therefore, unless φ
be supplied and display will halt. Since a DC voltage may be applied to the LCD panel in this
case, it is essential to ensure that φ
the system clock is switched. Therefore, the bits CKS3 to CKS0 must be specified appropriately
so that the frame frequency is fixed.
In the software standby mode, the segment output and common output pins switch to I/O ports. In
this case if a port's DDR or PCR bit is set to 1, a DC voltage may be applied to the LCD panel.
Therefore, DDR and PCR must never be set to 1 for ports being used for segment output or
common output.
Data
M
Static
1/2 duty
1/3 duty
1/4 duty
Operation in Power-Down Modes
Common output
Segment output
Common output
Segment output
Common output
Segment output
Common output
Segment output
SUB
, φ
SUB
/2, or φ
SUB
SUB
0
0
V1
V1
V2, V3
V1
V3
V2
V3
V2
/4 has been selected by bits CKS3 to CKS0, the clock will not
, φ
SUB
/2, or φ
SUB
0
1
V
V
V2, V3
V
V2
V3
V2
V3
/4 is selected. In active (medium-speed) mode,
SS
SS
SS
Rev. 2.00 Dec. 05, 2005 Page 525 of 724
1
0
V1
V
V1
V
V1
V
V1
V
Section 17 LCD Controller/Driver
SS
SS
SS
SS
REJ09B0200-0200
1
1
V
V1
V
V1
V
V1
V
V1
SS
SS
SS
SS