hd64338342hw Renesas Electronics Corporation., hd64338342hw Datasheet - Page 493

• Manufacturer Part Number: hd64338342hw
• Description: Renesas 8-bit Single-chip Microcomputer H8 Family/h8/300l Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Table 13.3 Output Levels
Data
M
Static
1/2 duty
1/3 duty
1/4 duty
13.3.5
In 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 w, w/2, or w/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 w, w/2, or w/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.
Table 13.4 Power-Down Modes and Display Operation
Mode
Clock
Display
operation ACT = “1” Stops Functions Functions Functions
Notes:
1. The subclock oscillator does not stop, but clock supply is halted.
2. The LCD drive power supply is turned off regardless of the setting of the PSW bit.
3. Display operation is performed only if w, w/2, or w/4 is selected as the operating clock.
4. The clock supplied to the LCD stops.
ACT = “0” Stops Stops
Operation in Power-Down Modes
w
Segment output
Segment output
Segment output
Segment output
Common output
Common output
Common output
Common output
Reset Active
Runs
Runs
Runs
Runs
Runs
Stops
Sleep
Runs
0
0
V
V
V
V
V
V
V
V
1
1
2
1
3
2
3
2
, V
3
Watch
Stops
Runs
Stops
*
3
0
1
V
V
V
V
V
V
V
V
SS
SS
2
SS
2
3
2
3
, V
Rev. 6.00 Aug 04, 2006 page 457 of 680
Subactive Subsleep Standby
Stops
Runs
Stops
Functions
*
3
3
Section 13 LCD Controller/Driver
Stops
Runs
Stops
Functions
*
1
0
V
V
V
V
V
V
V
V
3
1
SS
1
SS
1
SS
1
SS
REJ09B0145-0600
Stops
Stops *
Stops *
Stops *
1
1
V
V
V
V
V
V
V
V
1
2
2
SS
1
SS
1
SS
1
SS
1
Module
Standby
Stops *
Stops *
Stops
Stops
4
4