UPD70F3738GF-GAS-AX Renesas Electronics America, UPD70F3738GF-GAS-AX Datasheet - Page 887

• Manufacturer Part Number: UPD70F3738GF-GAS-AX
• Description: MCU 32BIT V850ES/JX3-L 100-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Lr

Specifications of UPD70F3738GF-GAS-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 84
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

26.4 Operation
26.4.1 To use for internal reset signal
Figure 26-2. Timing of Low-Voltage Detector Operation (LVIMD Bit = 1, Low-Voltage Detection Level: 2.80 V)
Depending on the setting of the LVIM.VIMD bit, an interrupt signal (INTLVI) or an internal reset signal is generated.
How to specify each operation is described below, together with timing charts.
<To start operation>
<1> Mask the interrupt of LVI.
<2> Select the voltage to be detected by using the LVIS.LVIS0 bit.
<3> Set the LVIM.LVION bit to 1 (to enable operation).
<4> Insert a wait cycle of 0.2 ms or more by software.
<5> By using the LVIM.LVIF bit, check if the supply voltage is lower than the detection voltage.
<6> Set the LVIMD bit to 1 (to generate an internal reset signal).
Caution If the LVIMD bit is set to 1, the contents of the LVIM and LVIS registers cannot be changed until a
LVI reset request signal
LVI detection voltage
Supply voltage (V
Internal reset signal
(2.80 V (TYP.))
reset request other than LVI is generated.
(active-low)
(active low)
LVION bit
DD
)
CHAPTER 26 LOW-VOLTAGE DETECTOR (LVI)
User’s Manual U18953EJ5V0UD
Time
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