R5F21274SNFP#U0 Renesas Electronics America, R5F21274SNFP#U0 Datasheet - Page 453

IC R8C/27 MCU FLASH 32LQFP

R5F21274SNFP#U0

Manufacturer Part Number
R5F21274SNFP#U0
Description
IC R8C/27 MCU FLASH 32LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/27r
Datasheet

Specifications of R5F21274SNFP#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
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
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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R8C/26 Group, R8C/27 Group
Rev.2.10
REJ09B0278-0210
Figure 21.3
21.3.2.3
The following two workarounds should be performed in programmable one-shot generation mode.
• Workaround example (b):
(3) To stop the timer counting in the primary period, use the TSTOP bit in the TRBCR register. In this case,
(1) To write to registers TRBPRE and TRBPR during count operation (TCSTF bit is set to 1), note the
• When the TRBPRE register is written continuously during count operation (TCSTF bit is set to 1), allow
• When the TRBPR register is written continuously during count operation (TCSTF bit is set to 1), allow
(2) Do not set both the TRBPRE and TRBPR registers to 00h.
Sep 26, 2008
As shown in Figure 21.3 detect the start of the primary period by the TRBO pin output level and write to
registers TRBSC and TRBPR. These write operations must be completed by the beginning of period A.
If the port register’s bit value is read after the port direction register’s bit corresponding to the TRBO pin is
set to 0 (input mode), the read value indicates the TRBO pin output value.
three or more cycles of the count source for each write interval.
three or more cycles of the prescaler underflow for each write interval.
bit corresponding to the TRBO pin
registers TRBPRE and TRBPR are initialized and their values are set to the values after reset.
following points:
(when the bit in the port direction
Read value of the port register’s
Programmable one-shot generation mode
Workaround Example (b) When TRBO Pin Output Value is Read
TRBO pin output
register is set to 0)
is detected at the end of the
The TRBO output inversion
underflow signal
Count source/
secondary period.
Page 434 of 453
prescaler
(i)
(ii) (iii)
Upon detecting (i), set the secondary and
then the primary register immediately.
Primary period
Ensure sufficient time
Secondary period
Period A
21. Usage Notes

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