UPD78F1506GF-GAT-AX Renesas Electronics America, UPD78F1506GF-GAT-AX Datasheet - Page 709

• Manufacturer Part Number: UPD78F1506GF-GAT-AX
• Description: MCU 16BIT 78K0R/LX3 128-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Lx3r

Specifications of UPD78F1506GF-GAT-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LCD, LVD, POR, PWM, WDT
• Number Of I /o: 78
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x12b, D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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78K0R/Lx3
16.8.2 Internal voltage boosting method
internal voltage boost circuit and external capacitors (0.47
bias mode or 1/4 bias mode can be set for the internal voltage boost method.
V
R01UH0004EJ0401 Rev.4.01
Jul 2, 2010
DD
The 78K0R/Lx3 microcontrollers contain an internal voltage boost circuit for generating LCD drive power supplies. The
The LCD drive voltage of the internal voltage boost method can supply a constant voltage, regardless of changes in
In addition, a contrast can be adjusted by using the LCD boost level control register (VLCD).
, because it is a power supply separate from the main unit.
Note V
Caution To stabilize the potential of the V
LCD Drive Voltage Pin
V
V
V
V
LC0
LC1
LC2
LC3
Figure 16-31. Examples of LCD Drive Power Connections (External Resistance Division Method) (2/2)
LC3
about 0.1
can be used as port (P02).
(c) 1/3 bias method
V
V
V
V
V
LC0
LC1
LC2
LC3
Table 16-10. LCD Drive Voltages (Internal Voltage Boosting Method)
μ
SS
F between each of the pins from V
Bias Method
V
LC0
= V
DD
3 x V
2 x V
LCD reference voltage
V
V
V
V
V
P02
V
DD
LC0
LC1
LC2
LC3
SS
LC2
LC2
/
Note
R
R
R
LC0
1/3 Bias Method
to V
−
μ
LC3
F±30%) are used to generate an LCD drive voltage. Only 1/3
LC0
pins, it is recommended to connect a capacitor of
to V
LC3
CHAPTER 16 LCD CONTROLLER/DRIVER
and the GND pin as needed.
(d) 1/4 bias method
V
V
V
V
V
LC0
LC1
LC2
LC3
4 x V
3 x V
2 x V
LCD reference voltage
SS
V
LC0
LC3
LC3
LC3
= V
DD
1/4 Bias Method
V
V
V
V
V
V
DD
LC0
LC1
LC2
SS
LC3
R
R
R
R
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