UPD78F0138 NEC, UPD78F0138 Datasheet - Page 417

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

POC detection voltage
LVI detection voltage
Supply voltage (V
Internal reset signal
Notes 1.
Remark <1> to <8> in Figure 23-4 above correspond to <1> to <8> in the description of “when starting operation”
POC reset signal
(set by software)
(set by software)
(set by software)
(set by software)
LVI reset signal
LVIRF flag
LVIMD flag
2.
3.
LVIMK flag
LVION flag
LVIE flag
LVIF flag
in 23.4 (1) When used as reset.
The LVIMK flag is set to “1” by RESET input.
The LVIF flag may be set (1).
LVIRF is bit 0 of the reset control flag register (RESF). For details of RESF, see CHAPTER 20
RESET FUNCTION.
(V
2.7 V
(V
Note 3
Figure 23-4. Timing of Low-Voltage Detector Internal Reset Signal Generation
POC
DD
LVI
)
)
)
<2>
Note 2
<1>
<3>
Note 1
<5>
<7>
<4> 2 ms or longer
<8>
CHAPTER 23 LOW-VOLTAGE DETECTOR
<6> 0.2 ms or longer
Not cleared
Not cleared
Not cleared
User’s Manual U16228EJ2V0UD
Cleared by
software
Not cleared
Not cleared
Not cleared
Cleared by
software
Clear
Clear
Clear
Clear
Time
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