Operation In Power-Down Modes - Renesas H8 Series Hardware Manual

Table 13.3 Output Levels
Data
M
Static Common output
Segment output
1/2 duty Common output
Segment output
1/3 duty Common output
Segment output
1/4 duty Common output
Segment output
13.3.3

Operation in Power-Down Modes

This LSI the LCD controller/driver can be operated even in the power-down modes. The
operating state of the LCD controller/driver in the power-down modes is summarized in table
13.4.
In subactive mode, watch mode, and subsleep mode, the system clock oscillator stops, and
therefore, unless φw, φw/2, or φw/4 has been selected by bits CKS3 to CKS0, the clock will not be
supplied and display will halt. Since there is a possibility that a direct current will be applied to
the LCD panel in this case, it is essential to ensure that φw, φw/2, or φw/4 is selected. In active
(medium-speed) mode, the system clock is switched, and therefore CKS3 to CKS0 must be
modified to ensure that the frame frequency does not change.
0 0
0 1
V V
1 SS
V V
1 SS
V , V V , V
2 3 2 3
V V
1 SS
V V
3 2
V V
2 3
V V
3 2
V V
2 3
Rev. 7.00 Mar 10, 2005 page 433 of 652
Section 13 LCD Controller/Driver
1 1
0 1
V V
1 SS
V V
SS 1
V V
1 SS
V V
SS 1
V V
1 SS
V V
SS 1
V V
1 SS
V V
SS 1
M: LCD alternation signal
REJ09B0042-0700