UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 254

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

(2) Low-voltage detection level select register (LVIS)
254
Address: FF51H, After reset: 00H
Symbol
LVIS
This register selects the low-voltage detection level.
This register can be set by an 8-bit memory manipulation instruction.
Reset input clears this register to 00H
Note For a reset by LVI, the value of LVIM is not initialized.
Cautions 1. Bits 4 to 7 must be set to 0.
LVIS3
Figure 16-3. Format of Low-Voltage Detection Level Select Register (LVIS)
0
0
0
0
0
0
0
0
1
1
7
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.
LVIS2
Other than above
0
0
0
0
1
1
1
1
0
0
6
0
Note
R/W
CHAPTER 16 LOW-VOLTAGE DETECTOR
Note
LVIS1
.
0
0
1
1
0
0
1
1
0
0
5
0
User’s Manual U16898EJ5V0UD
LVIS0
0
1
0
1
0
1
0
1
0
1
4
0
V
V
V
V
V
V
V
V
V
V
Setting prohibited
LVI0
LVI1
LVI2
LVI3
LVI4
LVI5
LVI6
LVI7
LVI8
LVI9
LVIS3
(4.3 V ±0.2 V)
(4.1 V ±0.2 V)
(3.9 V ±0.2 V)
(3.7 V ±0.2 V)
(3.5 V ±0.2 V)
(3.3 V ±0.15 V)
(3.1 V ±0.15 V)
(2.85 V ±0.15 V)
(2.6 V ±0.1 V)
(2.35 V ±0.1 V)
3
LVIS2
2
Detection level
LVIS1
1
LVIS0
0