CHAPTER 17 LOW-VOLTAGE DETECTOR
User’s Manual U17446EJ3V1UD
259
(2) Low-voltage
detection
level select register (LVIS)
This register selects the low-voltage detection level.
This register can be set by an 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H
Note
.
Figure 17-3. Format of Low-Voltage Detection Level Select Register (LVIS)
Address: FF51H, After reset: 00H
Note
R/W
Symbol
7 6 5 4 3 2 1 0
LVIS
0
0
0
0
LVIS3 LVIS2 LVIS1 LVIS0
LVIS3 LVIS2 LVIS1 LVIS0
Detection
level
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
Retained only after a reset by LVI.
Cautions 1. Bits 4 to 7 must be set to 0.
2. If values other than same values are written during LVI operation, the value
becomes undefined at the very moment it is written, and thus be sure to stop LVI
(bit 7 of LVIM register (LVION) = 0) before writing.
<R>
Содержание 78K0S/KB1+
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