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EVM Description

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2.2 EVM Configuration: Jumpers and Test Points

Table 2 summarizes the jumper settings. An asterisk (*) indicates the default setting of the jumpers.

Table 2. Jumper Settings Description

Jumper Shunt Position Description

Jumper settings for U1

JU1 Short* U1 VL pin connected to U1 VCC pin (single supply)

Open U1 VLpin disconnected from U1 VCC pin

JU2 1-2*

2-3

Direction Control Settings for U1.

Default setting is for 115.2kbps data rate. See Table 4

JU3 1-2

2-3*

JU4 1-2* U1 output level at TXOUT is set at +3dBm

2-3 U1 output level at TXOUT is adjustable by VR1

JU5 1-2* U1 uses on-board crystal

2-3 U1 uses external clock applied on SMA J2

JU6 Open* U1 uses on-board crystal

Short U1 uses external clock applied on SMA J2

JU15 Short* U1 SYNCOUT pulled up to VCC through a 1kΩ resistor

Open U1 SYNCOUT not pulled up to VCC

Jumper settings for U2

JU7 Short* U2 VL pin connected to U2 VCC pin

Open U2 VL pin disconnected from U2 VCC pin

JU8 1-2*

2-3

Direction Control Settings for U1.

Default setting is for 115.2kbps data rate. See Table 4

JU9 1-2

2-3*

JU10 1-2* U2 output level at TXOUT is set at +3dBm

2-3 U2 output level at TXOUT is adjustable by VR2

JU11 1-2* U2 uses on-board crystal

2-3 U2 uses external clock applied on SMA J4

JU12 Open* U2 uses on-board crystal

Short U2 uses external clock applied on SMA J4

JU16 Short* U2 SYNCOUT pulled up to VCC through a 1kΩ resistor

Open U2 SYNCOUT not pulled up to VCC

Jumper settings for U1 to U2 connections

JU13 Short* SMA J1 and J3 signals connected by a PCB trace (loopback)

Open SMA J1 and J3 signals not connected (requires external cable)

JU14, E3, E4 Short* U1 and U2 grounds connected

Open U1 and U2 grounds disconnected

E1, E2 Short* U1 VCC connected to U2 VCC

Open U1 VCC not connected to U2 VCC

* indicates the default jumper configuration

Table 3 summarizes the list of test points available on the EVM and their functionality.

SN65HVD62 AISG On-Off Keying Modem Evaluation Module (EVM) SLLU152–December 2012

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