r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 181

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
11.6
Figure 11.11
Table 11.10
KI0
KI1
KI2
KI3
A key input interrupt request is generated by one of the input edges on pins KI0 to KI3. The key input interrupt is
used as a key-on wake-up function to cancel wait mode or stop mode.
The KIiEN bit (i = 0 to 3) in the KIEN register is used to select whether the pins are used as the KIi input. The
KIiPL bit in the KIEN register can be used to select the input polarity.
When a low level is input to the KIi pin, which sets the KIiPL bit to 0 (falling edge), inputs to the other pins KI0 to
KI3 are not detected as interrupts. Likewise, when a high level is input to the KIi pin, which sets the KIiPL bit to 1
(rising edge), inputs to the other pins KI0 to KI3 are not detected as interrupts.
Figure 11.11 shows the Key Input Interrupt Block Diagram (i = 0 to 3). Table 11.10 lists the Key Input Interrupt Pin
Configuration.
Pin Name
KI3
KI2
KI1
KI0
Key Input Interrupt
KIiEN, KIiPL: Bits in KIEN register
Preliminary document
Specifications in this document are tentative and subject to change.
Key Input Interrupt Block Diagram (i = 0 to 3)
Key Input Interrupt Pin Configuration
Input
Input
Input
Input
I/O
KI3PL = 0
KI3PL = 1
KI2PL = 0
KI2PL = 1
KI1PL = 0
KI1PL = 1
KI0PL = 0
KI0PL = 1
KI0 interrupt input
KI1 interrupt input
KI2 interrupt input
KI3 interrupt input
KI3EN
KI2EN
KI1EN
KI0EN
Analog filter
Function
Key input interrupt request
Output for ELC
Page 150 of 725
11. Interrupts