R5F21274SDFP#U0 Renesas Electronics America, R5F21274SDFP#U0 Datasheet - Page 66

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
6.3
Table 6.4
NOTES:
Table 6.4 lists the Procedure for Setting Bits Associated with Voltage Monitor 1 Interrupt and Reset. Figure 6.14
shows an Example of Voltage Monitor 1 Interrupt and Voltage Monitor 1 Reset Operation (N, D Version). To use
the voltage monitor 1 interrupt or voltage monitor 1 reset to exit stop mode, set the VW1C1 bit in the VW1C
register to 1 (digital filter disabled).
1. Set the VW1C7 bit to 1 (when VCC reaches Vdet1 or below) for the voltage monitor 1 reset.
2. When the VW1C0 bit is set to 0, steps 3, 4, and 5 can be executed simultaneously (with 1
Step
4
5
1
2
3
6
7
8
9
(2)
(2)
instruction).
Voltage Monitor 1 Interrupt and Voltage Monitor 1 Reset (N, D Version)
Sep 26, 2008
Set the VCA26 bit in the VCA2 register to 1 (voltage detection 1 circuit enabled)
Wait for td(E-A)
Select the sampling clock of the digital filter
by the VW1F0 to VW1F1 bits in the VW1C
register
Set the VW1C1 bit in the VW1C register to 0
(digital filter enabled)
Set the VW1C6 bit in
the VW1C register to
0 (voltage monitor 1
interrupt mode)
Set the VW1C2 bit in the VW1C register to 0 (passing of Vdet1 is not detected)
Set the CM14 bit in the CM1 register to 0
(low-speed on-chip oscillator on)
Wait for 4 cycles of the sampling clock of the
digital filter
Set the VW1C0 bit in the VW1C register to 1 (voltage monitor 1 interrupt/reset enabled)
Procedure for Setting Bits Associated with Voltage Monitor 1 Interrupt and Reset
Voltage Monitor 1
Interrupt
Page 47 of 453
When Using Digital Filter
Set the VW1C6 bit in
the VW1C register to
1 (voltage monitor 1
reset mode)
Voltage Monitor 1
Reset
Select the timing of the interrupt and reset
request by the VW1C7 bit in the VW1C
register
Set the VW1C1 bit in the VW1C register to 1
(digital filter disabled)
Set the VW1C6 bit in
the VW1C register to
0 (voltage monitor 1
interrupt mode)
− (No wait time required)
Voltage Monitor 1
Interrupt
(1)
When Not Using Digital Filter
6. Voltage Detection Circuit
Set the VW1C6 bit in
the VW1C register to
1 (voltage monitor 1
reset mode)
Voltage Monitor 1
Reset

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