R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 165
![IC R8C/23 MCU FLASH 48-LQFP](/photos/12/38/123822/r5f21238dfp_u0_sml.jpg)
R5F21238DFP#U0
Manufacturer Part Number
R5F21238DFP#U0
Description
IC R8C/23 MCU FLASH 48-LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/23r
Specifications of R5F21238DFP#U0
Core Size
16/32-Bit
Program Memory Size
64KB (64K x 8)
Peripherals
POR, Voltage Detect, WDT
Core Processor
R8C
Speed
20MHz
Connectivity
CAN, I²C, LIN, SIO, SSU, UART/USART
Number Of I /o
41
Program Memory Type
FLASH
Ram Size
3K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-LQFP
No. Of I/o's
41
Ram Memory Size
3KB
Cpu Speed
20MHz
No. Of Timers
4
Digital Ic Case Style
LQFP
Embedded Interface Type
CAN, I2C, UART
Rohs Compliant
Yes
Cpu Family
R8C
Device Core Size
16b
Frequency (max)
20MHz
Interface Type
I2C/UART
Total Internal Ram Size
3KB
# I/os (max)
41
Number Of Timers - General Purpose
5
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
3V
On-chip Adc
12-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
48
Package Type
LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0K521237S000BE - KIT DEV RSK R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
Eeprom Size
-
Lead Free Status / Rohs Status
Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
14.1.5
Table 14.6
NOTE:
Count Sources
Count Operations
Count Start Condition
Count Stop Conditions
Interrupt Request
Generation Timing
INT1/TRAIO Pin
Function
TRAO Pin Function
Read from Timer
Write to Timer
Select Functions
1. Input the pulse whose period is longer than twice of the timer RA prescaler period. Input the longer
Pulse period measurement mode is mode to measure the pulse period of an external signal which inputs from
the INT1/TRAIO pin (see Table 14.6 Pulse Period Measurement Mode Specifications).
Figure 14.11 shows the TRAIOC Register in Pulse Period Measurement Mode and Figure 14.12 shows the
Operating Example of Pulse Period Measurement Mode.
pulse for “H” width and “L” width than the timer RA prescaler period. If the shorter pulse than the
period is input to the TRAIO pin, the input may be disabled.
Pulse Period Measurement Mode
Item
Pulse Period Measurement Mode Specifications
Page 143 of 501
f1, f2, f8, fOCO
• Decrement
• After an active edge of measurement pulse is input, contents for the read-out
• Write 0 (count stop) to TSTART bit in the TRACR register
• Write 1 (count forcibly stops) to the TSTOP bit in the TRACR register
• When timer RA underflows or reloads [timer RA interrupt]
• Rising or falling of the TRAIO input (end of measurement period) [timer RA
Measurement pulse input
Programmable I/O port
• When registers TRAPRE and TRA are written while the count is stopped,
• When registers TRAPRE and TRA are written during the count, values are
• Measurement level select
• Measurement pulse input pin select function
• Digital filter function
Write 1 (count start) to the TSTART bit in the TRACR register
The count value can be read by reading the TRA and TRAPRE registers.
buffer are retained at the first underflow of timer RA prescaler. Then timer RA
reloads contents in the reload register at the second underflow of timer RA
prescaler and continues counting.
interrupt]
values are written to both the reload register and counter.
written to the reload register and counter (refer to 14.1.1.1 Timer Write
Control during Count Operation).
The TEDGSEL bit in the TRAIOC register can select the measurement
period of input pulse.
P1_7 or P1_5 is selected by the TIOSEL bit in the TRAIOC register.
Bits TIPF0 and TIPF1 in the TRAIOC register enable or disable the digital
filter and select the sampling frequency.
(1)
(INT1 interrupt input)
Specification
14. Timers
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