R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 305
![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
-
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R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 14.130 Setting Example in Real-Time Clock Mode
TREWK, and bits H12_H24, PM,
Setting of TREIC
Setting of registers TRECSR,
TRESEC, TREMIN, TREHR,
and INT in TRECR1 register
select interrupt priority level)
Feb 29, 2008
(disable timer RE interrupt)
TRERST in TRECR1 = 1
TRERST in TRECR1 = 0
TSTART in TRECR1 = 0
TSTART in TRECR1 = 1
TCSTF in TRECR1 = 0?
TCSTF in TRECR1 = 1?
Setting of TRECR2
TREIC ← 00h
Page 286 of 485
(IR bit ← 0,
Select interrupt source
Stop timer RE operation
Timer RE register
and control circuit reset
Select clock output
Select clock source
Seconds, minutes, hours, days of week, operating mode
Set a.m./p.m., interrupt timing
Start timer RE operation
14. Timers
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