R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 165

• 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

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