R5F21274SNFP#U0 Renesas Electronics America, R5F21274SNFP#U0 Datasheet - Page 146

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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Manufacturer:
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R8C/26 Group, R8C/27 Group
Rev.2.10
REJ09B0278-0210
12.3
Figure 12.16
A key input interrupt request is generated by one of the input edges of the K10 to K13 pins. The key input interrupt
can be used as a key-on wake-up function to exit wait or stop mode.
The KIiEN (i = 0 to 3) bit in the KIEN register can select whether the pins are used as KIi input. The KIiPL bit in
the KIEN register can select the input polarity.
When inputting “L” to the KIi pin which sets the KIiPL bit to 0 (falling edge), the input of the other pins K10 to
K13 is not detected as interrupts. Also, when inputting “H” to the KIi pin, which sets the KIiPL bit to 1 (rising
edge), the input of the other pins K10 to K13 is not detected as interrupts.
Figure 12.16 shows a Block Diagram of Key Input Interrupt.
Pull-up
transistor
KI3
KI2
KI1
KI0
Key Input Interrupt
Sep 26, 2008
Pull-up
transistor
Pull-up
transistor
Pull-up
transistor
Block Diagram of Key Input Interrupt
Page 127 of 453
PU02 bit in PUR0 register
PD1_3 bit in PD1 register
KI3PL = 0
KI3PL = 1
KI2PL = 0
KI2PL = 1
KI1PL = 0
KI1PL = 1
KI0PL = 0
KI0PL = 1
KI3EN bit
KI2EN bit
KI1EN bit
KI0EN bit
PD1_3 bit
PD1_2 bit
PD1_1 bit
PD1_0 bit
KI0EN, KI1EN, KI2EN, KI3EN,
KI0PL, KI1PL, KI2PL, KI3PL: Bits in KIEN register
PD1_0, PD1_1, PD1_2, PD1_3: Bits in PD1 register
KUPIC register
Interrupt control
circuit
Key input interrupt
request
12. Interrupts

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