R5F21274SDFP#U0 Renesas Electronics America, R5F21274SDFP#U0 Datasheet - Page 58

IC R8C/27 MCU FLASH 32LQFP

R5F21274SDFP#U0

Manufacturer Part Number
R5F21274SDFP#U0
Description
IC R8C/27 MCU FLASH 32LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/27r
Datasheet

Specifications of R5F21274SDFP#U0

Core Processor
R8C
Core Size
16/32-Bit
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
LED, POR, Voltage Detect, WDT
Number Of I /o
25
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-LQFP
For Use With
R0K521276S000BE - KIT DEV RSK-R8C/26-29R0E521000EPB00 - PROBE EMULATOR FOR PC7501
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-

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R8C/26 Group, R8C/27 Group
Rev.2.10
REJ09B0278-0210
Figure 6.7
Voltage Detection Register 2
Voltage Detection Register 1
b7 b6 b5 b4 b3 b2 b1 b0
NOTES:
b7 b6 b5 b4
NOTES:
0 0 0 0
1.
2.
3.
4.
5.
6. Use the VCA20 bit only w hen entering to w ait mode. To set the VCA20 bit, follow the procedure show n in Figure
1.
2.
The VCA13 bit is enabled w hen the VCA27 bit in the VCA2 register is set to 1 (voltage detection 2 circuit enabled).
The VCA13 bit is set to 1 (VCC ≥ Vdet 2) w hen the VCA27 bit in the VCA2 register is set to 0 (voltage detection 2
circuit disabled).
The softw are reset, w atchdog timer reset, voltage monitor 1 reset, and voltage monitor 2 reset do not affect this
register.
Set the PRC3 bit in the PRCR register to 1 (w rite enable) before w riting to the VCA2 register.
To use the voltage monitor 0 reset, set the VCA25 bit to 1.
After the VCA25 bit is set to 1 from 0, the voltage detection circuit w aits for td(E-A) to elapse before starting
operation.
To use the voltage monitor 1 interrupt/reset or the VW1C3 bit in the VW1C register, set the VCA26 bit to 1.
After the VCA26 bit is set to 1 from 0, the voltage detection circuit w aits for td(E-A) to elapse before starting
operation.
To use the voltage monitor 2 interrupt/reset or the VCA13 bit in the VCA1 register, set the VCA27 bit to 1.
After the VCA27 bit is set to 1 from 0, the voltage detection circuit w aits for td(E-A) to elapse before starting
operation.
Softw are reset, w atchdog timer reset, voltage monitor 1 reset, and voltage monitor 2 reset do not affect this
register.
10.10 Procedure for Enabling Reduced Internal Pow er Consum ption Using VCA20 bit.
Sep 26, 2008
0
b3 b2 b1 b0
0 0 0
0
Registers VCA1 and VCA2 (N, D version)
0 0
Bit Symbol
Bit Symbol
VCA20
(b4-b1)
VCA25
VCA26
VCA27
(b2-b0)
(b7-b4)
Symbol
VCA13
Symbol
VCA2
VCA1
Page 39 of 453
(1)
Internal pow er low
consumption enable bit
Reserved bits
Voltage detection 0 enable
bit
Voltage detection 1 enable
bit
Voltage detection 2 enable
bit
Reserved bits
Voltage detection 2 signal monitor
flag
Reserved bits
(N, D Version)
(2)
(3)
(4)
(1)
Address
Bit Name
0032h
Address
Bit Name
0031h
(6)
The LVD0ON bit in the OFS register is
set to 1 and hardw are reset
Pow er-on reset, voltage monitor 0 reset
or LVD0ON bit in the OFS register is
set to 0, and hardw are reset
0 : Disables low consumption
1 : Enables low consumption
Set to 0.
0 : Voltage detection 0 circuit disabled
1 : Voltage detection 0 circuit enabled
0 : Voltage detection 1 circuit disabled
1 : Voltage detection 1 circuit enabled
0 : Voltage detection 2 circuit disabled
1 : Voltage detection 2 circuit enabled
Set to 0.
0 : VCC < Vdet2
1 : VCC ≥ Vdet2 or voltage detection 2
Set to 0.
circuit disabled
After Reset
Function
After Reset
00001000b
Function
(5)
6. Voltage Detection Circuit
(2)
: 00h
: 00100000b
RW
RW
RW
RW
RW
RW
RW
RW
RW
RO

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