UP-X200 (serv.man10). Parts Guide - Sharp EPOS Parts Guide (repair manual). Page 9

UP-X200

Reference Documents

– 7 –

[Low Battery or the battery compartment lid unlocked while in RUN status]

• Reduces OFF current by suspending the power supply and clock of

an unnecessary device, and setting up a CPU port.

•  Suspension is initiated in the following sequence.

1.

The buzzer sounds.

2.

Gwes Power Off System is called.

Note: The buzzer lets the user know that there is a device malfunction.

At the same time, the buzzer also acts as a warning to the user

not to remove the battery.

5

SW RESETSW Status

Transition to the reset status may be initiated in one of the following
way detailed below.

[Pressing the reset button (physical button)]

•  GPIO reset is generated regardless of whether the application is

in operation.

•  The reset button by default is inhibited by the software setting.

Control of the reset button should be set to enable GPIO resetting.
In order to render the reset button invalid while, for example, the

application is storing files on the flash disk, an API capable of

disabling GPIO resetting should be used as the system API.
GPIO resetting, that has been inhibited once can, when resetting

is executed by a different means, be reset as valid only when
allowed by the system API.

[Resetting by software using the GPIO]

•  This reset function is provided by the system API.

• Resetting by this software is also enabled when the above reset but-

ton is disabled.

*

Normally, pressing the reset button should not happen since this is
necessary only in the event of a software malfunction.
Resetting by software is carried out when software processing is nor-
mal. Thus, unexpected resetting while files are being stored on the
Flash disk or when communication with the server is in process can
be avoided. 

6

Reset Status
HW RESET is generated when the [Power] key and reset button
are pressed simultaneously in the OFF, RUN or IDLE status.
Because this operation is unconditional, HW RESET will be gener-
ated even if the reset button is disabled.

*

In other words, HW RESWET is effected if the [Power] key is
pressed when resetting by software is executed.

7

IDLE Status
The FCS should be used to reduce the CPU power consumption
while the CPU is in IDLE status.
In the RUN status, conditions should be CORE 400MHz (Turbo) or
200MHz (RUN), PXBus 200MHz (CCCR 0x161), and in the IDLE
status, CORE 100MHz, PXBus 50MHz (CCCR 0x0121).
Cases when FCS is not carried out in OEMIdle status

•  Touch or battery voltage detection

• Audio record/play

•  When SD is used

8

Discharge Status
This refers to battery discharge and involves no processing by software.

*

The key values shown above are default values and key changes
may be made by rewriting the registry.

The method of recognition ignores rollover when 2 keys are pressed
simultaneously. Additionally, when 2 keys are pressed simultaneously
and one of the two keys is released, the remaining key being depressed
will be valid only if it is different from the previous valid key and invalid if
the same.

Detection of Low battery:

Upon generation of an interruption, 3 read outs at 10ms
intervals are carried out to confirm that the battery is
active.

Detection of battery
compartment lid:

Upon generation of an interruption, 3 read outs at 10ms
intervals are carried out to confirm that the battery is
active.

Key Matrix Symbol

Virtual Key Code

PC Keyboard Symbol

(Reference)

0

VK_0

0

1

VK_1

1

2

VK_2

2

3

VK_3

3

4

VK_4

4

5

VK_5

5

6

VK_6

6

7

VK_7

7

8

VK_8

8

9

VK_9

9

Enter

VK_RETURN

ENTER

CL

VK_BACK

BS

UP

VK_UP

2

DOWN

VK_DOWN

4

RIGHT

VK_RIGHT

3

LEFT

VK_LEFT

1

TRG1

VK_F11

F11

TRG2

VK_F10

F10

•

VK_MULTIPLY

*

[1] pressed

3

[2] pressed

3

[2] cancelled 

3

[1] cancelled

4

4

4

1

Invalid

Invalid

[1] pressed

3

[2] pressed 

3

[1] cancelled

3

[2] cancelled

4

4

4

1

Invalid

2

[1] pressed

3

[2] pressed

3

[2] cancelled

3

[2] pressed

3

[1] cancelled

4

4

4

4

4

1

Invalid

Invalid

Invalid

2

: Key code which application receives.