R5F21257SYFP#U0 Renesas Electronics America, R5F21257SYFP#U0 Datasheet - Page 155
![MCU 2KB FLASH 48K 52-LQFP](/photos/28/61/286101/52-lqfp_sml.jpg)
R5F21257SYFP#U0
Manufacturer Part Number
R5F21257SYFP#U0
Description
MCU 2KB FLASH 48K 52-LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/25r
Specifications of R5F21257SYFP#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 ~ 105°C
Package / Case
52-LQFP
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 14.3
Timer RA Register
Timer RA Mode Register
Timer RA Prescaler Register
b7
NOTE:
b7 b6 b5 b4
NOTE:
b7
NOTE:
1.
1.
1.
When the TSTOP bit in the TRACR register is set to 1, the TRA register is set to FFh.
When both the TSTART and TCSTF bits in the TRACR register are set to 0 (count stops), rew rite this register.
When the TSTOP bit in the TRACR register is set to 1, the TRAPRE register is set to FFh.
Feb 29, 2008
b3 b2
Registers TRAMR, TRAPRE, and TRA
b1 b0
b0
b0
All modes
Timer mode
Pulse output mode
Event counter mode
Pulse w idth
measurement mode
Pulse period
measurement mode
Bit Symbol
TCKCUT
TRAMR
TMOD0
TMOD1
TMOD2
Symbol
TCK0
TCK1
TCK2
(b3)
Page 136 of 485
—
(1)
TRAPRE
Symbol
Symbol
Mode
Mode
TRA
Timer RA operating mode
select bits
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
Timer RA count source
select bits
Timer RA count source
cutoff bit
Address
Bit Name
0102h
Counts on underflow of timer RA prescaler
register
Counts an internal count source
Counts an internal count source
Counts an external count source
Counts internal count source
b2 b1 b0
0 0 0 : Timer mode
0 0 1 : Pulse output mode
0 1 0 : Event counter mode
0 1 1 : Pulse w idth measurement mode
1 0 0 : Pulse period measurement mode
1 0 1 :
1 1 0 :
1 1 1 :
b6 b5 b4
0 0 0 : f1
0 0 1 : f8
0 1 0 : fOCO
0 1 1 : f2
1 0 0 : fC32
1 0 1 :
1 1 0 :
1 1 1 :
0 : Provides count source
1 : Cuts off count source
Address
Address
Function
Function
0104h
0103h
Do not set.
Do not set.
After Reset
Function
00h
Setting Range
Setting Range
After Reset
After Reset
00h to FFh
00h to FFh
00h to FFh
00h to FFh
00h to FFh
00h to FFh
FFh
FFh
(1)
(1)
14. Timers
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
—
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