ML610Q428-NNNTBZ03A7 Rohm Semiconductor, ML610Q428-NNNTBZ03A7 Datasheet - Page 376

• Manufacturer Part Number: ML610Q428-NNNTBZ03A7
• Description: MCU 8BIT 48K FLASH 128-TQFP
• Manufacturer: Rohm Semiconductor

Specifications of ML610Q428-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: 14
• 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: -

25.3.2
Activation (ON) and deactivation (OFF) of the Battery Level Detector are controlled by setting the ENBL bit of the
Battery Level Detector control register (BLDCON1), and the result of the comparison of the power supply voltage
(VDD) to the threshold voltage is output to the BLDF bit of BLDCON1.
When ENBL, the enable control bit of the Battery Level Detector, is set to “1”, the detector is activated (ON). When
ENBL is set to “0”, the detector is deactivated (OFF) and has no supply current.
BLDF indicates the result of comparison. When BLDF bit is set to “1”, it indicates the power supply voltage is lower
than the threshold voltage. When BLDF bit is set to “0”, it indicates the power supply voltage (VDD) is higher than the
threshold voltage. The Battery Level Detector requires a settling time. Read BLDF bit 1ms or more after ENBL bit is
set to “1”.
Figure 25-2 shows an example of the operation timing diagram.
The operations in Figure 28-2 are described below.
Note:
Select the threshold voltage (VCMP) when the ENBL bit is “0”.
Threshold voltage
1 The Battery Level Detector is activated (ON) by setting the ENBL bit to “1”.
2 Wait the settling time (min. 1 ms) of the Battery Level Detector.
3 Read BLDF bit.
4 Set ENBL bit to “0”.
Operation
Operation of Battery Level Detector
ENBL
BLDF
V
CMP
V
SS
Figure 25-2 Example of Operation Timing Diagram
Set ENBL
1
Wait for settling time of BLD
↓
(Min. 1 ms)
“1” or “0”
V
CMP
2
25 – 6
Read BLDF
3
↓
ML610Q428/ML610Q429 User’s Manual
4
Set ENBL
↓
Chapter 25 Battery Level Detector