TOWER SYSTEM
Quick Start Guide for TWR-MC56F8257
Jumper
Option
Setting
Description
J8
DSC Serial Port
Reception RXD
Source Select
(note that only
one connection
can be made
to pin 3 at a
time)
1-2
Connect ELEV_RXD0 from the Tower connector to MC56F8257
DSC pin GPIOF8/RXD0/TB1
2-3
Connect RXD_SEL from the USB Serial Bridge to MC56F8257 DSC
pin GPIOF8/RXD0/TB1
Pin 2 open
Disconnect MC56F8257 DSC pin GPIOF8/RXD0/TB1
3-4
Connect RXD_SEL from the USB Serial Bridge to MC56F8257 DSC
pin GPIOF5/RXD1/XB_OUT5
4-5
Connect ELEV_RXD1 from the Tower connector to MC56F8257
DSC pin GPIOF5/RXD1/XB_OUT5
Pin 4 open
Disconnect MC56F8257 DSC pin GPIOF5/RXD1/XB_OUT5
J9
DSC Serial Port
Transmission
TXD Source
Select (note
that only one
connection can
be made to pin
3 at a time)
1-2
Connect ELEV_TXD0 from the Tower connector to MC56F8257
DSC pin GPIOC2/TXD0/TB0/XB_IN2/CLKO
2-3
Connect TXD_SEL from the USB Serial Bridge to MC56F8257 DSC
pin GPIOC2/TXD0/TB0/XB_IN2/CLKO
Pin 2 open
Disconnect MC56F8257 DSC pin GPIOC2/TXD0/TB0/XB_IN2/CLKO
3-4
Connect TXD_SEL from the USB Serial Bridge to MC56F8257 DSC
pin GPIOF4/TXD1/XB_OUT4
4-5
Connect TXD_SEL from the USB Serial Bridge to MC56F8257
DSC pin GPIOF4/TXD1/XB_OUT4
Pin 4 open
Shunt for BOOTMOD[1]=0 / Un-shunt for BOOTMOD[1]=1
J10 and
J11
5V Source
Select
J10-1 to J11-2
Connect the power in barrel connector (through fuse F1) to the input
of the 3.3V voltage regulator
J11-1 to J11-2
Connect P5V_TRG_USB (the switched USB 5V) to the input of
the 3.3V voltage regulator
J11-2 to J11-3
Connect P5V_ELEV to the input of the 3.3V voltage regulator
J11-2 open
Disconnect the input of the 3.3V voltage regulator
J12
Unused
open
Unused
TWR-MC56F8257 Jumper Options
(continued)
