ML610Q429-NNNTBZ03A7 Rohm Semiconductor, ML610Q429-NNNTBZ03A7 Datasheet - Page 323

• Manufacturer Part Number: ML610Q429-NNNTBZ03A7
• Description: MCU 8BIT 48K FLASH 128-TQFP
• Manufacturer: Rohm Semiconductor

Specifications of ML610Q429-NNNTBZ03A7

• Core Processor: nX-U8/100
• Core Size: 8-Bit
• Speed: 4.2MHz
• Connectivity: I²C, SSP, UART/USART
• Peripherals: LCD, Melody Driver, POR, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 48KB (24K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.1 V ~ 3.6 V
• Data Converters: A/D 2x12b, 2x24b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 70°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

24.1.3
The bias generation circuit generates LCD drive voltages (V
voltage regulator with the capacitors (C12 and C34).
When the BSON bit of the bias circuit control register (BIASCON) is set to “1”, the bias generation circuit starts
operation.
Display contrast adjustment is possible in 32 steps by using the display contrast register (DSPCNT).
Figure 24-5 shows the configurations of the bias generation circuit with 1/3 bias and with 1/4 bias.
Note:
When using 1/3 bias, connect the V
Configuration of the Bias Generation Circuit
Cd
Cb
Ca
C
C
Cd
Cb
Ca
C
C
Cc
Figure 24-5 Configuration of Bias Generation Circuit
34
12
34
12
L2
pin and the V
V
V
V
V
V
C4
C3
C2
C1
V
C4
C3
C2
C1
V
V
V
V
V
V
DD
L4
L3
L2
L1
SS
SS
DD
L4
L3
L2
L1
L3
pin externally.
power supply
power supply
Regulated
multiplier
(1) 1/3 Bias
Regulated
multiplier
(2) 1/4 Bias
Voltage
Voltage
24 – 5
circuit
circuit
L1
to V
L4)
by multiplying the voltage (VL1) generated by the
ML610Q428/ML610Q429 User’s Manual
Display contrast adjustment
(LCN4 to LCN0)
Selection of bias circuit On
(BSON)
Selection of 1/3 bias
(BSEL)
To LCD drivers
(V
Display contrast adjustment
(LCN4 to LCN0)
Selection of bias circuit On
(BSON)
Selection of 1/4 bias
(BSEL)
To LCD drivers
(V
L1
L1
to V
to V
L4
L4)
)
Chapter 24 LCD Drivers