5.2
JTAG/LFAST LVDS interface configuration
The following jumpers need to configure the JTAG/LFAST LVDS:
Table 2.
LFAST configuration jumpers
Jumper
Description
Default
J41
JTAG/LFAST LVDS pin 9 configuration
•
1-2: EVTO
•
2-3: ESR0
1-2
(EVTO)
J42
JTAG/LFAST LVDS pin 10 configuration
•
1-2: PORST
•
2-3: ESR0
1-2
(PORST)
5.3
System clock configuration
The mini module supports the usage of crystal clock sources as well as external clock source:
Table 3.
Clock configuration jumpers
Jumper
Description
Default
J21
EXTAL configuration
•
1-2 pin 2 of 40 MHz crystal (Y1)
•
2-3 EVB-EXTAL
1-2
(XT1 pin2)
J23
XTAL configuration
•
1-2 pin 1 of 40 MHz crystal (Y1)
•
2-3 GND
1-2
(XT1 pin1)
J22
Enable 8 MHz oscillator power supply
•
Open – power off
•
Closed – power on
Open
(power off)
J24
External 8 MHz clock source
•
1-2 OSC-MOD (from oscillator)
•
2-3 EXTAL-SMA (from SMA connector)
1-2
(8 MHz from oscillator)
UM2723
JTAG/LFAST LVDS interface configuration
UM2723
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Rev 1
page 8/28