Fujitsu FR81S User Manual
CHAPTER 35: REGULATOR CONTROL
4. Register
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : REGULATOR CONTROL
FUJITSU SEMICONDUCTOR CONFIDENTIAL
7
4.1. Regulator Output Voltage Select Register : REGSEL
(REGulator output voltage SELect register)
The bit configuration of the regulator output voltage selection register is shown below.
It is a register that selects the output voltage level of each regulator mode (main/sub/standby).
REGSEL : Address 0580
H
(Access : Byte, Half-word, Word)
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
MRSEL[1:0]
SRSEL[1:0]
STRSEL[2:0]
Reserved
Initial value
0
1
1
0
0
1
1
0
Attribute
R/W0
R/W1
R/W1
R/W0
R/W1
R/W1
R/W0
R0,WX
[bit7, bit6] MRSEL[1:0] (Main Regulator voltage SELect)
These bits set the output voltage level of main regulator (regulator mode : main mode).
MRSEL[1:0]
Main regulator output voltage
00
Reserved
01
1.2±0.1V
10
Reserved
11
Reserved
[bit5, bit4] SRSEL[1:0] (Sub Regulator voltage SELect)
These bits set the output voltage level of sub regulator (regulator mode : sub mode).
SRSEL[1:0]
Sub regulator output voltage
00
Reserved
01
Reserved
10
1.2±0.1V
11
Reserved
MB91520 Series
MN705-00010-1v0-E
1198