UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 549

• Manufacturer Part Number: UPD78F0537DGA(T)-9EV-A
• Description: 8BIT MCU, 128K FLASH, 7KB RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F0537DGA(T)-9EV-A

• Controller Family/series: UPD78
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

<R>
<R>
<R>
<R>
(2) Low-voltage detection level selection register (LVIS)
Address: FFBFH
Symbol
This register selects the low-voltage detection level.
This register can be set by a 1-bit or 8-bit memory manipulation instruction.
The generation of a reset signal other than an LVI reset clears this register to 00H.
LVIS
Notes 1.
Cautions 1. Be sure to clear bits 4 to 7 to “0”.
LVIS3
Figure 24-3. Format of Low-Voltage Detection Level Selection Register (LVIS)
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
7
0
2.
After reset: 00H
2. Do not change the value of LVIS during LVI operation.
3. When an input voltage from the external input pin (EXLVI) is detected, the detection
4. After an LVI reset has been generated, do not write values to LVIS and LVIM when
The value of LVIS is not reset but retained as is, upon a reset by LVI. It is cleared to 00H
upon other resets.
Do not set V
voltage (V
LVION = 1.
LVIS2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
6
0
Note 1
LVI10
EXLVI
CHAPTER 24 LOW-VOLTAGE DETECTOR
LVIS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
to V
5
0
= 1.21 V (TYP.)) is fixed. Therefore, setting of LVIS is not necessary.
R/W
LVI15
User’s Manual U17260EJ6V0UD
for (A2) grade products.
LVIS0
4
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
LVI0
LVI1
LVI2
LVI3
LVI4
LVI5
LVI6
LVI7
LVI8
LVI9
LVI10
LVI11
LVI12
LVI13
LVI14
LVI15
LVIS3
3
(4.24 V ±0.1 V)
(4.09 V ±0.1 V)
(3.93 V ±0.1 V)
(3.78 V ±0.1 V)
(3.62 V ±0.1 V)
(3.47 V ±0.1 V)
(3.32 V ±0.1 V)
(3.16 V ±0.1 V)
(3.01 V ±0.1 V)
(2.85 V ±0.1 V)
(2.70 V ±0.1 V)
(2.55 V ±0.1 V)
(2.39 V ±0.1 V)
(2.24 V ±0.1 V)
(2.08 V ±0.1 V)
(1.93 V ±0.1 V)
LVIS2
Detection level
2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
LVIS1
1
LVIS0
0
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