Quatech DSCLP-100 user manual Hardware Configuration, Factory Default Configuration

2 Hardware Configuration

The DSCLP-100 is automatically configured at boot time by the computer's BIOS or operating system. There are no required switches or jumpers to set for installation.

This chapter lists a number of optional jumper settings that control various hardware features. Jumpers J2, J4-J5 are grouped together at the end of the board opposite the HD-44 connector. Any changes from the factory default should be made before installing the DSCLP-100 in the computer.

2.1 Factory Default Configuration

Figure 2 shows the jumper configuration as shipped from the factory, with two spare jumpers applied in neutral positions. Remove one or both and apply as shown in following sections to set optional features.

J2

J4

J5

SPAD

X4

X2

Figure 2 --- Factory default jumper configuration

2.2 Enable Scratchpad Register (SPAD, J2)

In the default configuration, an Interrupt Status Register and an Options Register (see page 0) replace the scratchpad (base address + 7) of each UART. If the SPAD jumper is applied as in Figure 3, the UART scratchpad registers are enabled, and the Interrupt Status Register and the Options Register are not available.

J2

J4

J5

SPAD

X4

X2

Figure 3 --- Enable scratchpad registers

2.3 Force High-Speed UART Clock (X2 or X4, J4-J5)

2 DSCLP/SSCLP-100 User's Manual