R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 169

• 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
14.2
Figure 14.13
Timer RB is an 8-bit timer with an 8-bit prescaler.
The prescaler and timer consist of the reload register and counter. (Refer to Table 14.7 to 14.10 the Specification
of Each Modes).
Timer RB contains the timer RB primary and timer RB secondary as the reload register.
The count source for timer RB is the operating clock that regulates the timing of timer operations such as counting
and reloading.
Figure 14.13 shows the Block Diagram of Timer RB. Figures 14.14 and 14.16 show the registers associated with
timer RB.
Timer RB contains four operation modes listed as follows:
Timer RA underflow
TRBO pin
INT0 pin
TSTART, TCSTF: TRBCR register
TOSST: TRBOCR register
TOPL, TOCNT, INOSTG, INOSEG: TRBIOC register
TMOD1 to TMOD0, TCK1 to TCK0, TCKCUT: TRBMR register
•
•
•
•
TCK1 to TCK0 bit
Timer mode:
Programmable waveform generation mode:
Programmable one-shot generation mode:
Programmable wait one-shot generation mode: The timer outputs delayed one-shot pulse.
Timer RB
f1
f2
TMOD1 to TMOD0 bit
= 01b
f8
Block Diagram of Timer RB
= 00b
= 01b
= 10b
= 11b
,
10b, 11b
TCKCUT bit
Page 147 of 501
TOCNT = 1
TOCNT = 0
Digital filter
P3_1 bit in P3 register
edge or both edges
TRBPRE register
selected to be one
register
Reload
Input polarity
INT0EN bit
INT0PL bit
(Prescaler)
TSTART bit
Counter
The timer counts an internal count source (peripheral function
clock or timer RA underflows).
The timer outputs pulses of a given width successively.
The timer outputs one-shot pulse.
Peripheral data bus
TMOD1 to TMOD0 bit
= 10b or 11b
TOPL = 1
TOPL = 0
register
Reload
INOSEG bit
TRBSC
register
Polarity
Counter (timer RB)
select
(Timer)
Q
Q
Toggle flip-flop
TOSSTF bit
register
Reload
CLR
INOSTG bit
TRBPR
register
CK
TCSTF bit
TMOD1 to TMOD0 bit
= 01b
Timer RB interrupt
INT0 interrupt
,
10b, 11b
14. Timers