R5F21244SNFP#U0 Renesas Electronics America, R5F21244SNFP#U0 Datasheet - Page 176

• Manufacturer Part Number: R5F21244SNFP#U0
• Description: IC R8C MCU FLASH 16K 52LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/24r

Specifications of R5F21244SNFP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
14.2.2
Table 14.8
NOTES:
Count sources
Count operations
Width and period of
output waveform
Count start condition
Count stop conditions • 0 (count stops) is written to the TSTART bit in the TRBCR register.
Interrupt request
generation timing
TRBO pin function
INT0 pin function
Read from timer
Write to timer
Select functions
1. Even when counting the secondary period, the TRBPR register may be read.
2. The set values are reflected in the waveform output beginning with the following primary period after
3. The value written to the TOCNT bit is enabled by the following.
In programmable waveform generation mode, the signal output from the TRBO pin is inverted each time the
counter underflows, while the values in registers TRBPR and TRBSC are counted alternately (refer to Table
14.8 Programmable Waveform Generation Mode Specifications). Counting starts by counting the setting
value in the TRBPR register. The TRBOCR register is unused in this mode.
Figure 14.18 shows the TRBIOC Register in Programmable Waveform Generation Mode. Figure 14.19 shows
an Operating Example of Timer RB in Programmable Waveform Generation Mode.
writing to the TRBPR register.
• When count starts.
• When a timer RB interrupt request is generated.
Feb 29, 2008
The contents after the TOCNT bit is changed are reflected from the output of the following
primary period.
Item
Programmable Waveform Generation Mode
Programmable Waveform Generation Mode Specifications
f1, f2, f8, timer RA underflow
• Decrement
• When the timer underflows, it reloads the contents of the primary reload and
Primary period: (n+1)(m+1)/fi
Secondary period: (n+1)(p+1)/fi
Period: (n+1){(m+1)+(p+1)}/fi
fi: Count source frequency
n: Value set in TRBPRE register
m: Value set in TRBPR register
p: Value set in TRBSC register
1 (count starts) is written to the TSTART bit in the TRBCR register.
• 1 (count forcibly stops) is written to the TSTOP bit in the TRBCR register.
In half a cycle of the count source, after timer RB underflows during the
secondary period (at the same time as the TRBO output change) [timer RB
interrupt]
Programmable output port or pulse output
Programmable I/O port or INT0 interrupt input
The count value can be read out by reading registers TRBPR and TRBPRE
• When registers TRBPRE, TRBSC, and TRBPR are written while the count is
• When registers TRBPRE, TRBSC, and TRBPR are written to during count
• Output level select function
• TRBO pin output switch function
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secondary reload registers alternately before the count continues.
stopped, values are written to both the reload register and counter.
operation, values are written to the reload registers only.
The TOPL bit in the TRBIOC register selects the output level during primary and
secondary periods.
Timer RB pulse output or P3_1 latch output is selected by the TOCNT bit in the
TRBIOC register.
(3)
Specification
(2)
14. Timers
(1)
.