ON Semiconductor AR1820HS, Руководство пользователя

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AR1820HSSC12SHQAH3 − GEVB
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Table 1. JUMPERS AND HEADERS
(continued)
Jumper/Header No. Description Pins Jumper/Header Name
P12 CLK_SELECT 1 − 2 (Default) Select On-board Oscillator
2 − 3 Select External Reference Oscillator
P13 EEPROM ADDR Sel A1 Closed,
A2 Open
(Default)
EEPROM Address Set to 0xA8
A1 Open,
A2 Open
EEPROM Address Set to 0xAC
A1 Open,
A2 Closed
EEPROM Address Set to 0xA4
A1 Closed,
A2 Closed
EEPROM Address Set to 0xA0
P14 I
2
C Selection 1 − 2 & 3 − 4
(Default)
Selects I
2
C Pass-through for Normal Operation
1, 3, 5 Connect to External I
2
C Master
SW1 RESET N/A When Pushed, 240 ms Reset Signal will be Sent to AR1820
Interfacing to ON Semiconductor Demo 3 Baseboard
The ON Semiconductor Demo 3 baseboard has a similar
52-pin connector which mates with J8 of the headboard.
The four mounting holes secure the baseboard and the
headboard with spacers and screws.
Shorted Jumpers for Power Measurement
Different supplies to the evaluation board are provided by
trace shorted jumper, for any voltage and power
measurements. To conduct current for current measurement
on a given power rail, cut the trace between the two pins of
their respective JP, and insert an ammeter prior to powering
up the system. The figure below shows where the trace to cut
is located.
Table 2. SHORTED JUMPERS FOR POWER
MEASUREMENT
Jumper Voltage (V)
JP1 (+2V8_VAA) 2.8
JP2 (+5V0) 5.0
JP3 (+2V8_VAAPIX) 2.8
JP4 (+3V3) 3.3
JP7 (+VDDIO_1V8_PHY) 1.8
JP8 (+DVDD1V8) 1.8
JP9 (+1V2_VDDPHY) 1.2
JP11 (+1V2_VDVDD) 1.2
Figure 7. Top and Bottom View of Shorted Jumper.
The Bottom View Shows the Trace Location to Cut for Current Measurement
Cut Here