Rev. 8/28/03

SP3508 Evaluation Board Manual

© Copyright 2003 Sipex Corporation

11

TABLE 5. SP3508 LOGIC JUMPER SETTING

Switch

Jumper

LOGIC 1

LOGIC 2

D0

JP22

VCC (2-3)

GND (1-2)

DECODER

D1

JP23

VCC (2-3)

GND (1-2)

DECODER

D2

JP24

VCC (2-3)

GND (1-2)

DECODER

LOOPBACK

JP25

VCC (2-3)

GND (1-2)

Logic 0 indicates SP508 is in LOOPBACK mode

TERM_OFF

JP20

VCC (2-3)

GND (1-2)

Logic 1 internal termination is disables

D_LATCH

JP21

VCC (2-3)

GND (1-2)

Logic 0 Latch is disabled

SDEN

JP41

VCC (2-3)

GND (1-2)

Logic 1 TXD driver is enabled

TTEN

JP40

VCC (2-3)

GND (1-2)

Logic 1 TXCE driver is enabled

STEN

JP39

VCC (2-3)

GND (1-2)

Logic 1 ST driver is enabled

RSEN

JP38

VCC (2-3)

GND (1-2)

Logic 1 RTS driver is enabled

TREN

JP37

VCC (2-3)

GND (1-2)

Logic 1 DTR driver is enabled

RRCEN

JP36

VCC (2-3)

GND (1-2)

Logic 1 DCD_DCE driver is enabled

RLEN

JP35

VCC (2-3)

GND (1-2)

Logic 1 SD driver is enabled

/LLEN

JP34

VCC (2-3)

GND (1-2)

Logic 0 LL driver is enabled

/RDEN

JP33

VCC (2-3)

GND (1-2)

Logic 0 RXD receiver is enabled

/RTEN

JP32

VCC (2-3)

GND (1-2)

Logic 0 RXT receiver is enabled

/TXCEN

JP31

VCC (2-3)

GND (1-2)

Logic 0 TXC receiver is enabled

/CSEN

JP30

VCC (2-3)

GND (1-2)

Logic 0 CTS receiver is enabled

/DMEN

JP29

VCC (2-3)

GND (1-2)

Logic 0 DSR receiver is enabled

/RRTEN

JP28

VCC (2-3)

GND (1-2)

Logic 0 DCD_DTE receiver is enabled

/ICEN

JP27

VCC (2-3)

GND (1-2)

Logic 0 RI receiver is enabled

TMEN

JP26

VCC (2-3)

GND (1-2)

Logic 1 TM receiver is enabled

Figure 8 shows 3-pin jumper configuration and Table 5 describes the fuctionalities of each

jumper setting configuration.

Figure 8. 3-Pin Jumper Configuration

12

3

JP1 - JP4 are set of jumpers that the user can select which signals to be accessed by DB25.

Figure 9 shows 3-pin jumper configuration and Table 5 describes the signal to be accessed

by DB25 per its configuration.

Figure 9. 3-Pin Jumper Configuration

1

2

3

Signal

Jumper

Jumper

to be accessed

Configuration

by DB25

STa

JP1

1-2

TxCa

JP1

2-3

STb

JP2

1-2

TxCb

JP2

2-3

RRTa

JP3

1-2

RRCa

JP3

2-3

RRTb

JP4

1-2

RRCb

JP4

2-3

TABLE 6. SP3508 JUMPER SETTINGS