Hitachi SH7760 Solution Engine2 Overview page 94

(4) PONSWF
PONSWF bit
0
1
[Supplementary description on application switch key input]
(1) When multiple keys are pressed at the same time, the corresponding bits are all set to "1," and a KEY_ONF interrupt
occurs so long as it is enabled.
(2) If data in the key bit pattern register changes when multiple keys are pressed at the same time, a KEY_ONF interrupt
occurs so long as it is enabled.
- Example -
This KEY_ONF interrupt occurs when the state with switches SW1 and SW2 pressed simultaneously changes to one
with switches SW1 and SW3 pressed simultaneously.
(3) When multiple keys are released in the state with the keys pressed and held, a KEY_OFFI interrupt occurs so long as
it is enabled.
(4) When multiple keys are released, the key states immediately before key release are retained in the key bit pattern
register.
The power-on switch has not been turned on for 2sec or more.
The power-on switch has been turned on for 2 sec or more.
At this time, if the PONSWI bit is set to "1," a power-on interrupt
occurs.
[Clear condition]
This bit is cleared when "0" is written to the PONSWF bit set to "1."
Seeting
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