upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 783

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

(2)
(3)
Notes: 1. This register can be written only in a specific sequence (see 3.2.3 ”Special registers” on
Symbol
Symbol
RAMS
LVIS
R/W
R/W
Low-voltage detection level selection register (LVIS)
The LVIS register is used to select the level of low-voltage to be detected.
This register can be read or written in 8-bit or 1-bit units.
Reset input clears this register to 00H.
Internal RAM data status register (RAMS)
The RAMS register is a flag register that indicates whether the internal RAM is valid or not.
This register can be read or written in 8-bit or 1-bit units
Reset input
2. Setting conditions: Detection of voltage lower than specified level
Figure 24-3: Low-Voltage Detection Level Selection Register (LVIS) Format
page 70).
Clearing condition: Writing of 0 in specific sequence
RAMF
LVIS0
R
R
7
0
7
0
0
1
0
1
Note 2
Figure 24-4: Internal RAM Data Status Register (RAMS) Format
V
V
valid
invalid
R
sets this register to 01H.
R
6
0
6
0
LVI0
LVI1
(4.4 V ±0.2 V)
(4.2 V ±0.2 V)
User’s Manual U16702EE3V2UD00
R
R
5
0
5
0
Set by instruction
Generation of reset signal by WDT2
Generation of reset signal while RAM is being accessed
Generation of reset signal by clock monitor
Chapter 24 Low-Voltage Detector
R
R
4
0
4
0
Internal RAM data valid/invalid
R
R
3
0
3
0
Detection level
R
R
2
0
2
0
Note 1
R
R
1
0
1
0
.
RAMF
LVIS0
R/W
R/W
0
0
FFFFF891H
FFFFF892H
Address
Address
After reset
After reset
00H
01H
783