hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 476

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 13 LCD Controller/Driver
Table 13.4 Power-Down Modes and Display Operation
Mode
Clock
Display
operation
Notes: 1. The subclock oscillator does not stop, but clock supply is halted.
13.3.4
When a large panel is driven, the on-chip power supply capacity may be insufficient. If the power
supply capacity is insufficient when V
must be reduced. This can be done by connecting bypass capacitors of around 0.1 to 0.3 µF to
pins V
Rev. 7.00 Mar 10, 2005 page 434 of 652
REJ09B0042-0700
1
2. The LCD drive power supply is turned off regardless of the setting of the PSW bit.
3. Display operation is performed only if φw, φw/2, or φw/4 is selected as the operating
4. The clock supplied to the LCD stops.
to V
φ
φw
ACT = 0
ACT = 1
Boosting the LCD Drive Power Supply
clock.
3
, as shown in figure 13.9, or by adding a split-resistance externally.
This LSI
Reset Active
Runs
Runs
Stops
Stops
V
V
Figure 13.9 Connection of External Split-Resistance
CC
SS
Runs
Runs
Stops
Functions Functions Functions *
V
V
V
1
2
3
Sleep
Runs
Runs
Stops
CC
is used as the power supply, the power supply impedance
R
R
R
R
Watch
Stops
Runs
Stops
R = several kΩ to
3
Sub-
active
Stops
Runs
Stops
Functions *
several MΩ
3
Sub-
sleep
Stops
Runs
Stops
Functions *
C = 0.1 to 0.3 µF
3
Stops
Stops *
Stops *
Stops *
Standby
1
2
2
Module
Standby
Stops *
Stops *
Stops
Stops
4
4