upd178016 Renesas Electronics Corporation., upd178016 Datasheet - Page 55

• Manufacturer Part Number: upd178016
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

4.5
(1) Panel state detection timing
(2) Operations performed when front panel detachment and replacement are detected
Front panel
state
When the high level state of the panel input signal is detected ten times in a row, the panel is assumed to have
been detached (see <1>). The time required to assume that the panel has been detached is 10 ms 10 + Time
required for sensing = 100 ms or longer but less than 110 ms.
The timing at which the replacement of the front panel is detected is the same as above.
When the front panel is judged to have been detached, the power is turned off irrespective of the setting of the
POWER key.
When the panel is judged as being installed, the setting of the POWER key is checked and, if it is judged to
be OK, the power is turned on.
(See Sections 4.1 and 4.2 for details on power state transitions.)
Detection of Front Panel Detachment
PANEL
Detached
Replaced
High
Low
: Timing at which the panel input signal is sensed
10 ms
PD178016GC-051
<1>
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