R5F21272SDFP#U0 Renesas Electronics America, R5F21272SDFP#U0 Datasheet - Page 174

IC R8C/27 MCU FLASH 32LQFP

R5F21272SDFP#U0

Manufacturer Part Number
R5F21272SDFP#U0
Description
IC R8C/27 MCU FLASH 32LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/27r
Datasheet

Specifications of R5F21272SDFP#U0

Core Processor
R8C
Core Size
16/32-Bit
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
LED, POR, Voltage Detect, WDT
Number Of I /o
25
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-LQFP
For Use With
R0K521276S000BE - KIT DEV RSK-R8C/26-29R0E521000EPB00 - PROBE EMULATOR FOR PC7501
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-

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Part Number:
R5F21272SDFP#U0
Manufacturer:
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Quantity:
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Part Number:
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Manufacturer:
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Manufacturer:
Renesas Electronics America
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R8C/26 Group, R8C/27 Group
Rev.2.10
REJ09B0278-0210
14.1.5
Table 14.6
NOTES:
Count sources
Count operations
Count start condition
Count stop conditions
Interrupt request
generation timing
INT1/TRAIO pin function Measured pulse input
TRAO pin function
Read from timer
Write to timer
Select functions
1. Input a pulse with a period longer than twice the timer RA prescaler period. Input a pulse with a
2. For J, K version, fC32 cannot be selected.
In pulse period measurement mode, the pulse period of an external signal input to the INT1/TRAIO pin is
measured (refer to Table 14.6 Specifications of Pulse Period Measurement Mode).
Figure 14.10 shows the TRAIOC Register in Pulse Period Measurement Mode and Figure 14.11 shows an
Operating Example of Pulse Period Measurement Mode.
longer “H” and “L” width than the timer RA prescaler period. If a pulse with a shorter period is input to
the TRAIO pin, the input may be ignored.
Sep 26, 2008
Pulse Period Measurement Mode
Item
Specifications of Pulse Period Measurement Mode
Page 155 of 453
f1, f2, f8, fOCO, fC32
• Decrement
• After the active edge of the measured pulse is input, the contents of the read-
1 (count start) is written to the TSTART bit in the TRACR register.
• 0 (count stop) is written to TSTART bit in the TRACR register.
• 1 (count forcibly stops) is written 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
Programmable I/O port
The count value can be read by reading registers TRA and TRAPRE.
• 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 period select
• Measured pulse input pin select function
• Digital filter function
out buffer are retained at the first underflow of timer RA prescaler. Then timer
RA reloads the 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 selects the measurement period of
the 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.
(2)
(1)
(INT1 interrupt input)
Specification
14. Timers

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