DF2266TF13V Renesas Electronics America, DF2266TF13V Datasheet - Page 542

• Manufacturer Part Number: DF2266TF13V
• Description: IC H8S/2266 MCU FLASH 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2200r

Specifications of DF2266TF13V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 13MHz
• Connectivity: I²C, SCI, SmartCard
• Peripherals: LCD, POR, PWM, WDT
• Number Of I /o: 67
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 17 LCD Controller/Driver
Table 17.7 Power-Down Modes and Display Operation
Mode
Clock
Display
operation
Notes: 1. The subclock oscillator does not stop, but clock supply is halted.
17.4.5
The simplest way to achieve low-power operation for an LCD power supply circuit is to use an
internal division resistor. However, since the values of the internal resistors are fixed, a constant
current continually flows from Vcc to Vss of the internal resistor. Since the quantity of the current
is independent of the dissipation current of an LCD panel, power is wasted in using a low-power
LCD. This LSI incorporates a function that eliminates wastage of power. By using this function, a
power supply circuit that is most suitable for the power of a given LCD panel can be obtained.
• Principle
Rev. 5.00 Sep. 01, 2009 Page 490 of 656
REJ09B0071-0500
⎯ As shown in figure 17.11, external capacitors are connected to V1, V2, and V3 of the LCD
⎯ The capacitors connected to V1, V2, and V3 are repeatedly charged and discharged to
⎯ In this case, the charged voltages are equivalent to V1, V2, and V3, respectively. (In 1/3
⎯ Power is supplied to the LCD panel by the electric charges that are accumulated in these
⎯ The capacitances of the capacitors and the charge-discharge period are determined by the
⎯ The charge-discharge period can be determined by software.
power supply terminals.
retain required voltage levels in the cycles shown in figure 17.11.
bias operation, for example, the V2 voltage is two thirds of the V1 voltage and the V3
voltage is one third of the V1 voltage.)
capacitors.
quantity of power which the LCD panel requires.
2. The LCD drive power supply is turned off regardless of the setting of the PSW bit.
3. Display operation is performed only if φ
4. The clock supplied to the LCD stops.
φ
φ
ACT = 0 Stops
ACT = 1 Stops
w
Low-Power LCD Drive
clock.
Reset
Runs
Runs
Active
Runs
Runs
Stops
Functions Functions Functions *
Sleep
Runs
Runs
Stops
Watch
Stops
Runs
Stops
SUB
3
Subactive Subsleep
Stops
Runs
Stops
Functions *
, φ
SUB
/2, or φ
3
Stops
Runs
Stops
Functions *
SUB
/4 is selected as the operating
3
Software
Standby
Stops
Stops *
Stops *
Stops *
1
2
2
Hardware
standby
Stops
Stops
Stops *
Stops *
2
2
Module
Stop
Stops *
Stops *
Stops
Stops
4
4