Renesas R8C/20 User Manual

R8C/20 Group, R8C/21 Group 12. Interrupts
Rev.2.00 Aug 27, 2008 Page 105 of 458
REJ09B0250-0200
Figure 12.17 KIEN Register
Key Input Enable Register
(1)
Symbol Address After Reset
KIEN
00FBh 00h
Bit Symbol Bit Name Function RW
NOTE:
1.
RW
KI0 input polarity select bit 0 : Falling edge
1 : Rising edge
KI1 input enable bit 0 : Disable
1 : Enable
b3 b2
RW
KI2EN RW
KI1PL
KI1 input polarity select bit 0 : Falling edge
1 : Rising edge
KI2 input enable bit 0 : Disable
1 : Enable
b7 b6 b5 b4 b1 b0
The IR bit in the KUPIC register may be set to 1 (requests interrupt) w hen the KIEN register is rew ritten.
Refer to
12.6.4 Changing Interrupt Sources
.
KI1EN RW
KI3EN
KI3 input enable bit
KI3PL RW
KI2PL
KI2 input polarity select bit 0 : Falling edge
1 : Rising edge
KI3 input polarity select bit 0 : Falling edge
1 : Rising edge
KI0EN RW
KI0PL RW
KI0 input enable bit 0 : Disable
1 : Enable
RW
0 : Disable
1 : Enable

Renesas R8C/20 Specifications

General

Architecture	R8C
CPU Clock Speed	20 MHz
Flash Memory	8 KB to 32 KB
Serial Interfaces	UART, I2C, SPI
Operating Voltage	2.7 V to 5.5 V
Core	R8C
Timers	8-bit timer x 2
ADC	10-bit
Package	LQFP
Operating Temperature	-20°C to +85°C