R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 57
![IC R8C/25 MCU FLASH 52LQFP](/photos/12/37/123739/r5f21257snfp_u0_sml.jpg)
R5F21257SNFP#U0
Manufacturer Part Number
R5F21257SNFP#U0
Description
IC R8C/25 MCU FLASH 52LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/25r
Specifications of R5F21257SNFP#U0
Core Processor
R8C
Core Size
16/32-Bit
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
POR, Voltage Detect, WDT
Number Of I /o
41
Program Memory Size
48KB (48K x 8)
Program Memory Type
FLASH
Ram Size
2.5K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
52-LQFP
For Use With
R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
- Current page: 57 of 527
- Download datasheet (6Mb)
R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 6.7
Voltage Monitor 1 Circuit Control Register
b7 b6 b5 b4
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9. When the VW1C6 bit is set to 1 (voltage monitor 1 reset mode), set the VW1C7 bit to 1 (w hen VCC reaches Vdet1 or
Set the PRC3 bit in the PRCR register to 1 (rew rite enable) before w riting to the VW1C register.
To use the voltage monitor 1 interrupt to exit stop mode and to return again, w rite 0 to the VW1C1 bit before w riting
1.
Bits VW1C2 and VW1C3 are enabled w hen the VCA26 bit in the VCA2 register is set to 1 (voltage detection 1 circuit
enabled).
Set this bit to 0 by a program. When 0 is w ritten by a program, it is set to 0 (and remains unchanged even if 1 is
w ritten to it).
The VW1C6 bit is enabled w hen the VW1C0 bit is set to 1 (voltage monitor 1 interrupt/enabled reset).
The VW1C0 bit is enabled w hen the VCA26 bit in the VCA2 register is set to 1 (voltage detection 1 circuit enabled).
Set the VW1C0 bit to 0 (disable) w hen the VCA26 bit is set to 0 (voltage detection 1 circuit disabled).
The VW1C7 bit is enabled w hen the VW1C1 bit is set to 1 (digital filter disabled mode).
Bits VW1C2 and VW1C3 remain unchanged after a softw are reset, w atchdog timer reset, voltage monitor 1 reset,
or voltage monitor 2 reset.
below ). (Do not set to 0.)
Feb 29, 2008
b3
b2
VW1C Register
b1 b0
Bit Symbol
VW1C0
VW1C2
VW1C3
VW1C6
VW1C7
VW1C1
VW1F0
VW1F1
Symbol
VW1C
Page 38 of 485
Voltage monitor 1 interrupt/reset
enable bit
Voltage monitor 1 digital filter
disable mode select bit
Voltage change detection
flag
Voltage detection 1 signal monitor
flag
Sampling clock select bits
Voltage monitor 1 circuit mode
select bit
Voltage monitor 1 interrupt/reset
generation condition select bit
(3, 4, 8)
(3, 8)
(5)
(6)
(1)
Address
Bit Name
0036h
(2)
(7, 9)
b5 b4
0 0 : fOCO-S divided by 1
0 1 : fOCO-S divided by 2
1 0 : fOCO-S divided by 4
1 1 : fOCO-S divided by 8
0 : Disable
1 : Enable
0 : Digital filter enabled mode
1 : Digital filter disabled mode
0 : Not detected
1 : Vdet1 crossing detected
0 : VCC < Vdet1
1 : VCC ≥ Vdet1 or voltage detection 1
0 : Voltage monitor 1 interrupt mode
1 : Voltage monitor 1 reset mode
0 : When VCC reaches Vdet1 or above
1 : When VCC reaches Vdet1 or below
(digital filter circuit enabled)
(digital filter circuit disabled)
circuit disabled
After Reset
00001000b
Function
6. Voltage Detection Circuit
(8)
RW
RW
RW
RW
RW
RW
RW
RW
RO
Related parts for R5F21257SNFP#U0
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![R0K330290S001BE](/photos/28/41/284146/r0k330290s001be_tmb.jpg)
Part Number:
Description:
KIT STARTER FOR M16C/29
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K5212D8S001BE](/photos/24/13/241324/4607177_tmb.jpg)
Part Number:
Description:
KIT STARTER FOR R8C/2D
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K33062PS001BE](/photos/24/13/241320/4607173_tmb.jpg)
Part Number:
Description:
R0K33062P STARTER KIT
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K521237S001BE](/photos/28/41/284170/r0k521237s001be_tmb.jpg)
Part Number:
Description:
KIT STARTER FOR R8C/23 E8A
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K521256S001BE](/photos/24/13/241323/4607176_tmb.jpg)
Part Number:
Description:
KIT STARTER FOR R8C/25
Manufacturer:
Renesas Electronics America
Datasheet:
![YLCDRSK2456S](/images/manufacturer_photos/0/5/560/renesas_electronics_america_tmb.jpg)
Part Number:
Description:
KIT STARTER H8S2456 SHARPE DSPLY
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K521380S000BE](/photos/28/41/284144/r0k521380s000be_tmb.jpg)
Part Number:
Description:
KIT STARTER FOR R8C38C
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K521350S000BE](/photos/28/41/284145/r0k521350s000be_tmb.jpg)
Part Number:
Description:
KIT STARTER FOR R8C35C
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K52L3A0S000BE](/photos/28/41/284149/r0k52l3a0s000be_tmb.jpg)
Part Number:
Description:
KIT STARTER FOR R8CL3AC+LCD APPS
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K556100S000BE](/images/manufacturer_photos/0/5/560/renesas_electronics_america_tmb.jpg)
Part Number:
Description:
KIT STARTER FOR RX610
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K564189S000BE](/photos/28/41/284173/r0k564189s000be_tmb.jpg)
Part Number:
Description:
KIT STARTER FOR R32C/118
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K521276S000BE](/photos/9/26/92647/r0k521276s000be_tmb.jpg)
Part Number:
Description:
KIT DEV RSK-R8C/26-29
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K571242S001BE](/photos/9/23/92397/r0k571242s001be_tmb.jpg)
Part Number:
Description:
KIT STARTER FOR SH7124
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K561622S000BE](/photos/9/23/92398/r0k561622s000be_tmb.jpg)
Part Number:
Description:
KIT STARTER FOR H8SX/1622
Manufacturer:
Renesas Electronics America
Datasheet:
![R0K572030S000BE](/photos/9/24/92406/r0k572030s000be_tmb.jpg)
Part Number:
Description:
KIT DEV FOR SH7203
Manufacturer:
Renesas Electronics America
Datasheet: