R5F21274SDFP#U0 Renesas Electronics America, R5F21274SDFP#U0 Datasheet - Page 53

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
6.
The voltage detection circuit monitors the input voltage to the VCC pin. This circuit can be used to monitor the VCC
input voltage by a program. Alternately, voltage monitor 0 reset (for N, D version only), voltage monitor 1 interrupt
(for N, D version only), voltage monitor 1 reset, voltage monitor 2 interrupt, and voltage monitor 2 reset can also be
used.
Table 6.1 lists the Specifications of Voltage Detection Circuit (N, D version) and Table 6.2 lists the Specifications of
Voltage Detection Circuit (J, K Version). Figures 6.1 to 6.6 show the Block Diagrams. Figures 6.7 to 6.12 show the
associated registers.
Table 6.1
VCC Monitor
Process
When Voltage
is Detected
Digital Filter
Voltage Detection Circuit
Sep 26, 2008
Item
Specifications of Voltage Detection Circuit (N, D version)
Voltage to monitor
Detection target
Monitor
Reset
Interrupt
Switch
enabled/disabled
Sampling time
Page 34 of 453
Vdet0
Whether passing
through Vdet0 by rising
or falling
None
Reset at Vdet0 > VCC;
restart CPU operation at
VCC > Vdet0
None
Available
(Divide-by-n of fOCO-S)
× 4
n: 1, 2, 4, and 8
Voltage monitor 0 reset
Voltage Detection 0
Voltage monitor 1 interrupt Voltage monitor 2 interrupt
Vdet1
Passing through Vdet1 by
rising or falling
VW1C3 bit in VW1C
register
Whether VCC is higher or
lower than Vdet1
Voltage monitor 1 reset
Reset at Vdet1 > VCC;
restart CPU operation
after a specified time
Interrupt request at Vdet1
> VCC and VCC > Vdet1
when digital filter is
enabled;
interrupt request at Vdet1
> VCC or VCC > Vdet1
when digital filter is
disabled
Available
(Divide-by-n of fOCO-S)
× 4
n: 1, 2, 4, and 8
Voltage Detection 1
6. Voltage Detection Circuit
Vdet2
Passing through Vdet2 by
rising or falling
VCA13 bit in VCA1
register
Whether VCC is higher or
lower than Vdet2
Voltage monitor 2 reset
Reset at Vdet2 > VCC;
restart CPU operation
after a specified time
Interrupt request at Vdet2
> VCC and VCC > Vdet2
when digital filter is
enabled;
interrupt request at Vdet2
> VCC or VCC > Vdet2
when digital filter is
disabled
Available
(Divide-by-n of fOCO-S)
× 4
n: 1, 2, 4, and 8
Voltage Detection 2

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