UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 487

• Manufacturer Part Number: UPD78F0413GA-GAM-AX
• Description: 8BIT UC, 32K FLASH, 1KB RAM, LCD
• Manufacturer: NEC

Specifications of UPD78F0413GA-GAM-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 30
• Ram Memory Size: 1024Byte
• Cpu Speed: 10MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 32KB
• Oscillator Type: External, Internal

Address: FFBEH
Symbol
LVIM
Notes 1.
Cautions 1. To stop LVI, follow either of the procedures below.
LVION
LVISEL
LVIMD
LVION
LVIF
<7>
0
1
0
1
0
1
0
1
Notes 3, 4
Note 3
2.
3.
4.
Note 3
After reset: 00H
2. Input voltage from external input pin (EXLVI) must be EXLVI < V
3. When using LVI as an interrupt, if LVION is cleared (0) in a state below the LVI
This bit is cleared to 00H upon a reset other than an LVI reset.
Bit 0 is read-only.
LVION, LVIMD, and LVISEL are cleared to 0 in the case of a reset other than an LVI reset.
These are not cleared to 0 in the case of an LVI reset.
When LVION is set to 1, operation of the comparator in the LVI circuit is started. Use
software to wait for an operation stabilization time (10 s (MAX.)) from when LVION is set to 1
until operation is stabilized. After operation has stabilized, 200 s (MIN.) are required from
when a state below LVI detection voltage has been entered, until LVIF is set (1).
Disables operation
Enables operation
Detects level of supply voltage (V
Detects level of input voltage from external input pin (EXLVI)
Figure 22-2. Format of Low-Voltage Detection Register (LVIM)
detection voltage, an INTLVI signal is generated and LVIIF becomes 1.
LVISEL = 0: Generates an internal interrupt signal when the supply voltage (V
LVISEL = 1: Generates an interrupt signal when the input voltage from an external
LVISEL = 0: Generates an internal reset signal when the supply voltage (V
LVISEL = 1: Generates an internal reset signal when the input voltage from an
LVISEL = 0: Supply voltage (V
LVISEL = 1: Input voltage from external input pin (EXLVI)
LVISEL = 0: Supply voltage (V
LVISEL = 1: Input voltage from external input pin (EXLVI) < detection voltage (V
When using 8-bit memory manipulation instruction: Write 00H to LVIM.
When using 1-bit memory manipulation instruction: Clear LVION to 0.
6
0
Note 1
Low-voltage detection operation mode (interrupt/reset) selection
CHAPTER 22 LOW-VOLTAGE DETECTOR
lower than the detection voltage (V
V
input pin (EXLVI) drops lower than the detection voltage (V
V
detection voltage (V
external input pin (EXLVI) < detection voltage (V
reset signal when EXLVI
disabled
or when operation is disabled
LVI
EXLVI
5
0
or higher (V
R/W
) or when EXLVI becomes V
User’s Manual U18698EJ1V0UD
Note 2
Enables low-voltage detection operation
4
0
Voltage detection selection
DD
Low-voltage detection flag
DD
DD
DD
)
) < detection voltage (V
LVI
)
V
LVI
) and releases the reset signal when V
detection voltage (V
).
V
EXLVI
3
0
.
EXLVI
LVI
) (V
or higher (EXLVI
LVISEL
<2>
DD
LVI
< V
LVI
), or when operation is
)
LVI
detection voltage (V
EXLVI
) or when V
LVIMD
) and releases the
<1>
V
EXLVI
EXLVI
DD
DD
DD
) (EXLVI <
becomes
).
DD
) <
DD
V
.
LVIF
<0>
LVI
EXLVI
) drops
EXLVI
.
),
)
487