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Hardware / Jumpers

Author: Karel Slaný ()
Update: 18.3.2009
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Jumper

Description

J2

connects the right channel of JP6 to the microphone input of audio codecs (FITkit 2.0)

J3

connects the right channel of JP6 to the link input of audio codecs (FITkit 2.0)

J4

connects the left channel of JP6 to the link input of audio codecs (FITkit 2.0)

J5

enables interrupt from FPGA to MCU (FITkit 2.0)

J6

activates PS2, RS232, VGA

J7

the shortage of this jumper disables USB converter FT2232

J8

enables the controlling of MCU RST signal using DTR

J9

enables the controlling of MCU TCK signal using RTS

J11

connects RXD with P3

J12

connects TXD with P3

J13

connects audio input with MCU port (AIR) (FITkit 1.x)

J14

connects audio input with MCU port (AIL) (FITkit 1.x)

J15

connects audio output with MCU port (AOR) (FITkit 1.x)

J16

connects audio output with MCU port (AOL) (FITkit 1.x)

J17

referential voltage for analog converter (FITkit 1.x)

J18

the FT2232 can use EEPROM memmory

J19

audio amplifier (SHD - MUTE) (FITkit 1.x)

  • Jumper J7 allows to deactivate the USB converter. If the jumper is shorted, the FITkit behaves is disconnected from USB bus (like the cale is pulled out).

  • Jumpers J8, J9 form a pair. If the jumpers are open a reset of the MCU is performed and the MCU runs the program without the need of a running terminal application. These jumpers have to be connected during programming.

  • Jumpers J11 a J12 connect the MCU to the serial channel provided by USB converter. It is not possible to communicate with the MCU from the terminal if the jumpers are removed.

  • Jumpers J13, J14, J15, J16 connect the MCU to the audio amplifier. The jumper J19 behaves like MUTE if jumper is removed. The amplifier is active when the the jumper is closed.

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