Renesas H8S/2100 Series Hardware Manual page 604

Section 19 Keyboard Buffer Control Unit (PS2)
KCLK
First KCLK
falling edge
Internal flag
Figure 19.18 Internal Flag of First KCLK Falling Interrupt in Software Standby Mode and
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REJ09B0462-0100
1
Interrupt generated
Watch Mode
2 3
Automatic clear
Interrupt accepted
(Accepted at any timing)