Hardware Configuration; Factory Default Configuration; Enable Scratchpad Register (Spad, J2); Force High-Speed Uart Clock (X2, X4, Or X8, J3-J5) - Quatech QSCLP-100 User Manual

2 Hardware Configuration

The QSCLP-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-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 QSCLP-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.
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.

2.3 Force High-Speed UART Clock (X2, X4, or X8, J3-J5)

2
J2
J3
J4
J5
J2
J3
J4
J5
Figure 3 --- Enable scratchpad registers
SPAD
X8
X4
X2
SPAD
X8
X4
X2
QSCLP-100 User's Manual