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Setting
SW1-1
SW1-2
4.3 Reset Generation (SW3)
The onboard Supervisor IC (U2) for the voltage level monitoring generates a reset if the
voltage supply of 5V falls under 4.75V and 3.3V falls under 3.14V. Additionally, it is possible
to generate a reset via push button SW3.
SW3
By pushing this button a reset is generated.
Pushed momentarily Soft Reset (Reset asserted for 100us only: Reset LED,
-
LD8, does NOT turn on.)
Pushed for longer than 2 seconds Hard Reset (Reset asserted for 200ms:
-
Reset LED, LD8, turns on until button is released.)
Note:
-
During normal operation, Reset LED, LD8, should be off.
-
If the Reset LED is steadily on or blinks periodically, check the power supply
input voltage.
4.4 NTSC Decoder (JP1)
The Graphics Display Controller (GDC) of the device has a internal NTSC decoder. The
decoder has its own dedicated Analog-to-Digital converter whose low side reference voltage
can be set through JP1.
Provides NTSC decoder's A/D with AVSS3V3 as low voltage reference; external
JP1
reference voltage can be connected.
Jumper
JP1
4.5 Rotary Encoder RE1 (JP4, JP6)
The on-board Rotary Encoder (RE1) has the following jumpers:
Connect/Disconnect Channel B output of Rotary Encoder from MCU's ICU0 (pin
JP4
110).
Connect/Disconnect Channel A output of Rotary Encoder from MCU's ICU5_2 (pin
JP6
109).
UG-910097-11
Chapter 4 Jumpers and Switches
Description
P127 pulled up to MCU's VCC5
ON
MCU's MD0 (pin 86) disconnected from MCU's VCC5
OFF
MCU's MD0 (pin 86) connected to MCU's VCC5
ON
Table 4. SW1 settings for Program and Run modes.
Setting
Closed
Open
Table 5. NTSC Decoder's A/D Low Reference Voltage.
Description
AVSS3V3 connected to AVR3 (pin 203)
External
voltage
provided.
- 14 -
© Fujitsu Semiconductor Europe GmbH
reference
may
be
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