upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 788

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

24.5 RAM Retention Voltage Detection Operation
The supply voltage and detected voltage are compared. When the supply voltage drops below the
detected voltage (including on power application), the RAMF bit is set.
788
RAM retention voltage
RAM retention flag
detected voltage
detection signal
detection signal
Supply voltage
Figure 24-8: Operation Timing of RAM Retention Voltage Detection Function
RAM retention
POC detected
POC detected
Set condition
(RAMF bit)
voltage
voltage
(V
DD
)
Delay
Chapter 24 Low-Voltage Detector
Delay
Cleared by
instruction
User’s Manual U16702EE3V2UD00
Set
Cleared by
instruction
Clear
Set
Delay
Time