R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 152

• 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
Figure 14.1
Timer RA is an 8-bit timer with an 8-bit prescaler.
The prescaler and timer consist of the reload register and counter. The reload register and counter are allocated at
the same address. When accessing the TRAPRE and TRA registers, the reload register and counter can be accessed
(refer to Table 14.2 to 14.6 the Specification of Each Modes).
The count source for timer RA is the operating clock that regulates the timing of timer operations such as counting
and reloading.
Figure 14.1 shows the Block Diagram of Timer RA. Figures 14.2 to 14.4 show the registers associated with Timer
RA.
Timer RA contains five operation modes listed as follows:
INT1/TRAIO (P1-7) pin
INT1/TRAIO (P1-5) pin
•
•
•
•
•
Timer mode:
Pulse output mode:
Event counter mode:
Pulse width measurement mode: The timer measures the pulse width of an external pulse.
Pulse period measurement mode: The timer measures the pulse period of an external pulse.
Timer RA
TCK2 to TCK0 bit
fOCO
TRAO pin
f1
f8
f2
Block Diagram of Timer RA
= 000b
= 001b
= 010b
= 011b
TIOSEL = 0
TIOSEL = 1
TIPF1 to TIPF0 bit
f32
f1
f8
= 00b
= 10b
= 11b
TOENA bit
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TIPF1 to
TIPF0 bit
= Except 00b
= 00b
TMOD2 to TMOD0
Digital
filter
= Except 010b
TMOD2 to TMOD0
invert the polarity by underflow of the timer.
The timer counts an internal count source.
The timer counts an internal count source and outputs the pulses which
The timer counts external pulses.
switching
Polarity
= 010b
TMOD2 to TMOD0 = 001b
TOPCR bit
TCKCUT
TMOD2 to TMOD0
bit
= 011b or 100b
TCSTF, TSTOP: TRACR register
TEDGSEL, TOPCR, TOENA, TIOSEL, TIPF1, TIPF0: TRAIOC register
TMOD2 to TMOD0, TCK2 to TCK0, TCKCUT: TRAMR register
TCSTF
bit
TEDGSEL = 1
TEDGSEL = 0
Count control
TRAPRE register
register
circle
Reload
(Prescaler)
Counter
Peripheral data bus
Q
Q
Measurement completion signal
Toggle flip-flop
CLR
register
Reload
TRA register
CK
Counter
(Timer)
Write to TRAMR register
Write to TSTOP bit 1
Underflow signal
Timer RA interrupt
14. Timers