R5F21294SNSP#U0 Renesas Electronics America, R5F21294SNSP#U0 Datasheet - Page 185

• Manufacturer Part Number: R5F21294SNSP#U0
• Description: MCU 3/5V 16K+2K 20PIN-SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/29r

Specifications of R5F21294SNSP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• 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 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/28 Group, R8C/29 Group
Rev.2.10
REJ09B0279-0210
14.2.4
Table 14.10
NOTES:
Count sources
Count operations
Wait time
One-shot pulse
output time
Count start
conditions
Count stop
conditions
Interrupt request
generation timing
TRBO pin function
INT0 pin functions
Read from timer
Write to timer
Select functions
1. The set value is reflected at the following one-shot pulse after writing to registers TRBSC and TRBPR.
2. Do not set both the TRBPRE and TRBPR registers to 00h.
3. Set the TRBOSEL bit in the PINSR2 register to 1 (enabled) before using timer RB.
In programmable wait one-shot generation mode, a one-shot pulse is output from the TRBO pin by a program
or an external trigger input (input to the INT0 pin) (refer to Table 14.10 Specifications of Programmable Wait
One-Shot Generation Mode). When a trigger is generated from that point, the timer outputs a pulse only once
for a given length of time equal to the setting value in the TRBSC register after waiting for a given length of
time equal to the setting value in the TRBPR register.
Figure 14.22 shows the TRBIOC Register in Programmable Wait One-Shot Generation Mode. Figure 14.23
shows an Operating Example of Programmable Wait One-Shot Generation Mode.
Refer to 7. Programmable I/O Ports for details.
Sep 26, 2008
Item
Programmable Wait One-Shot Generation Mode
Specifications of Programmable Wait One-Shot Generation Mode
f1, f2, f8, timer RA underflow
• Decrement the timer RB primary setting value.
• When a count of the timer RB primary underflows, the timer reloads the contents of
• When a count of the timer RB secondary underflows, the timer reloads the contents of
• When the count stops, the timer reloads the contents of the reload register before it
(n+1)(m+1)/fi
(n+1)(p+1)/fi
• The TSTART bit in the TRBCR register is set to 1 (count starts) and the next trigger is
• Set the TOSST bit in the TRBOCR register to 1 (one-shot starts).
• Input trigger to the INT0 pin
• When reloading completes after timer RB underflows during secondary period.
• When the TOSSP bit in the TRBOCR register is set to 1 (one-shot stops).
• When the TSTART bit in the TRBCR register is set to 0 (starts counting).
• When the TSTOP bit in the TRBCR register is set to 1 (forcibly stops counting).
In half a cycle of the count source after timer RB underflows during secondary period
(complete at the same time as waveform output from the TRBO pin) [timer RB interrupt]
Pulse output
• When the INOSTG bit in the TRBIOC register is set to 0 (INT0 one-shot trigger
• When the INOSTG bit in the TRBIOC register is set to 1 (INT0 one-shot trigger
The count value can be read out by reading registers TRBPR and TRBPRE.
• When registers TRBPRE, TRBSC, and TRBPR are written while the count stops,
• When registers TRBPRE, TRBSC, and TRBPR are written to during count operation,
• Output level select function
• One-shot trigger select function
timer RB secondary before the count continues.
timer RB primary before the count completes and the TOSSTF bit is set to 0 (one-shot
stops).
stops.
generated.
disabled): programmable I/O port or INT0 interrupt input
enabled): external trigger (INT0 interrupt input)
values are written to both the reload register and counter.
values are written to the reload registers only.
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fi: Count source frequency
n: Value set in the TRBPRE register, m Value set in the TRBPR register
fi: Count source frequency
n: Value set in the TRBPRE register, p: Value set in the TRBSC register
The TOPL bit in the TRBIOC register selects the output level of the one-shot pulse
waveform.
Refer to 14.2.3.1 One-Shot Trigger Selection.
(3)
Specification
(1)
(2)
14. Timers