Microsemi ZLE30267, Руководство по оборудованию

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ZLE30267 Hardware Guide
December 2015 17
Silkscreen
Reference
Device/ Function Basic Setting
Schematic
Sheet
Description
J20 SMA Connector 3 DUT TEST_GPIO3 connection point
JP20 2 pin header Shunt installed 3 Connect DUT TEST_GPIO3 to LEDs/local controller port
Local Oscillator
The board provides several options for driving the timing device’s XA input pin from an on-board oscillator,
crystal, or an external source.
Table 4 summarizes the oscillator related hardware jumpers and connectors
and functionality. Table 5 summarizes board jumper settings required to set up each clock source.
Table 4 · XA Pin Oscillator Configurable Hardware
Silkscreen
Reference
Device/ Function Basic Setting
Schematic
Sheet
Description
JP69 6 pin header Shunt pins 5-6 7 2-pin shunt installed connects OSC power (see JP70) to one
of three oscillators (pins 1-2= JP67 header for daughter card;
pins 3-4 = Y2; pins 5-6= Y3)
JP67
10-pin receptacle for
oscillator daughter
board
7 Microsemi custom daughter board installs here.
JP64 10 pin header Shunt pins 1-3 7
XA pin clock patch header. Shunt settings are as follows:
pins 1-2: JP67 to J31 (monitor JP67)
pins 1-3: JP67 to DUT XA pin
pins 3-5: Y2 to DUT XA pin
pins 5-7: Y2 to J31 (monitor Y2)
pins 4-6: Y3 to DUT XA pin
pins 6-8: Y3 toJ31 (monitor Y3)
pins 2-4: J31 to DUT XA pin (external clock in)
J31 SMA connector 7
Access point for monitoring an oscillator on board, or providing
DUT XA pin clock from an external clock source
JP66 2 pin header Open 7
Open selects AC coupled clock connection to J31; shunt
selects DC coupling to J31
JP72 6 pin header Shunt pins 3-4 7
Header for mounting optional XTAL or oscillator device.
Located on bottom side of board. Shunt on pins 3-4 patches
oscillator signal from patch header JP64 to DUT XA pin
Table 5 · DUT XA Pin Source Selection Jumper Settings
Clock Source Jumper Settings
Y2 on-board 3.2mm x 2.5mm single-ended oscillator site JP69 = shunt pin 3-4
JP64 = shunt pin 3-5
JP72 = shunt pin 3-4
JP70 = Osc voltage. Open=1.8V; shunt pins 1-2 =3.3V; shunt pins
2-3= 2.5V