CHAPTER 19 LOW-VOLTAGE DETECTOR
Preliminary User’s Manual U16846EJ1V0UD
324
(2) Low-voltage
detection
level selection register (LVIS)
This register selects the low-voltage detection level.
This register can be set by an 8-bit memory manipulation instruction.
RESET input clears LVIS to 00H.
Figure 19-3. Format of Low-Voltage Detection Level Selection Register (LVIS)
0
LVIS0
1
LVIS1
2
LVIS2
3
LVIS3
4
0
5
0
6
0
7
0
Symbol
LVIS
Address: FFBFH After reset: 00H R/W
LVIS3 LVIS2 LVIS1 LVIS0
Detection
level
Note
0 0 0 0
V
LVI0
(4.3 V
±
0.2 V)
0 0 0 1
V
LVI1
(4.1 V
±
0.2 V)
0 0 1 0
V
LVI2
(3.9 V
±
0.2 V)
0 0 1 1
V
LVI3
(3.7 V
±
0.2 V)
0 1 0 0
V
LVI4
(3.5 V
±
0.2 V)
0 1 0 1
V
LVI5
(3.3 V
±
0.15 V)
0 1 1 0
V
LVI6
(3.1 V
±
0.15 V)
0 1 1 1
V
LVI7
(2.85 V
±
0.15 V)
1 0 0 0
V
LVI8
(2.6 V
±
0.1 V)
1 0 0 1
V
LVI9
(2.35 V
±
0.1 V)
Other than above
Setting prohibited
Note Do not set V
LVI7
to V
LVI9
when using a mask ROM version of the 78K0/KB1 for program evaluation.
Caution Be sure to clear bits 4 to 7 to 0.