HD64F2168 Datasheet, PDF (123/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

KIN15 to KIN0 Interrupts, WUE15 to WUE8 Interrupts: Interrupts KIN15 to KIN0 and
WUE15 to WUE8 are requested by an input signal at pins KIN15 to KIN0 and WUE15 to WUE8.
Interrupts KIN15 to KIN0 and WUE15 to WUE8 have the following features:
• Interrupts KIN15 and KIN8, KIN7 to KIN0 and WUE15 to WUE8 each form a group. The
interrupt exception handling for an interrupt request from the same group is started at the same
vector address.
• Enabling or disabling of interrupt requests can be selected with the I bit in CCR.
• An interrupt is generated by a falling edge at pins KIN15 to KIN0 and WUE15 to WUE8.
• Enabling or disabling of interrupt requests KIN15 to KIN0 and WUE15 to WUE8 can be
selected using KMIMRA, KMIMR6, and WUEMR3.
• The status of interrupt requests KIN15 to KIN0 and WUE15 to WUE8 are not indicated.
The detection of KIN15 to KIN0 and WUE15 to WUE8 interrupts does not depend on whether the
relevant pin has been set for input or output. However, when a pin is used as an external interrupt
input pin, clear the corresponding port DDR to 0 so that it is not used as an I/O pin for another
function.
A block diagram of interrupts KIN15 to KIN0 and WUE15 to WUE8 is shown in figure 5.3.
KMIMn
KINn input
Falling-edge
S
Q
detection circuit
R
KINn interrupt request
n = 15 to 0
Clear signal
Figure 5.3 Block Diagram of Interrupts KIN15 to KIN0 and WUE15 to WUE8
(Example of KIN15 to KIN0)
Rev. 3.00, 03/04, page 83 of 830