Peripherals; Crystals; Jumper Description; Segment Lcd - Atmel SAM4C User Manual

Peripherals

4.2
4.2.1

Crystals

The AFE Control Board-SAM4C contains two crystals that can be used as clock sources for the SAM4C device.
More information about oscillator allowance and safety factor can be found in application note AVR4100.
4.2.2

Jumper Description

The AFE Control Board-SAM4C contains three jumpers that are used for function selection of the board. Table 4-
5 shows the details.
Table 4-5 Jumper Description
Jumper
Function
Name
JP1 JTAGSEL
JP2 TST
JP3 ERASE
4.2.3

Segment LCD

The AFE Control Board-SAM4C has an LCD module with 6 common and 17 segment terminals. These 102
segments form several symbols and nine 7-segment characters. Figure 4-1 shows the details.
Table 4-3 External 32.768 KHz Crystal
Pin on SAM4C
XIN32 XIN32
XOUT32 XOUT32
Table 4-4 External 8.192MHz Crystal
Pin on SAM4C
PA31 XIN
PA30 XOUT
Pin on SAM4C
JTAG boundary scan select pin. It can be left unconnected for
normal operation.
JTAGSEL
For detailed information please refer to SAM4C_datasheet.pdf
TST is used for JTAG test. It can be left unconnected for normal
operation.
TST
For detailed information please refer to SAM4C_datasheet.pdf
It can erase program in SAM4C flash when it's connected upon
power up. After power up, JP3 is no longer functional.
ERASE/PC9
For detailed information please refer to SAM4C_datasheet.pdf
Function
Function
Description
AFE Control Board-SAM4C [User Guide] 9