Quatech MPA-100, RS-232 SYNCHRONOUS 5. JUMPER CONFIGURATIONS

5. JUMPER CONFIGURATIONS

The MPA-100 utilizes various jumper blocks which allow the user to customize their

hardware configuration. The following sections explain the function and setting of each of the

jumper blocks on the MPA-100.

The jumper packs J2, J11, and J12 control the DTE/DCE configuration of the MPA-100.

J2 determines the board setting (DTE or DCE) while the jumper packs J11 and J12 control the

routing of the signals to the DB-25 connector. All three jumper packs must be set exclusively to

either DTE or DCE for correct operation of the MPA-100.

Table 3 DTE/DCE Jumper Selections

1-2, 3-4, 5-6, 7-81-5, 2-6, 3-7, 4-8J12

1-2, 3-4, 5-6, 7-8, 9-10, 11-12,

13-14, 15-16

1-9, 2-10, 3-11, 4-12, 5-13,

6-14, 7-15, 8-16

J11

no connection1-2J2

DCE

DTE (Default)

J11 and J12 may be configured for DTE by setting all jumpers vertical on the board and for DCE

by setting all jumpers horizontal on the board.

J4 is a three pin jumper which determines the configuration for the interrupts. By

selecting pins 1 & 2, the user has the ability to share interrupts with other Quatech adapter cards.

The MPA-100 will drive the interrupt onto the bus only when an interrupt occurs. Otherwise, the

output is high impedance. If pins 2 & 3 of J4 are selected, then interrupts abide by the IBM

specification and cannot be shared. Table 4 summarizes the jumper block selections for J4.

Table 4 Jumper Block J4 Selections

2-3No Interrupt sharing

1-2

Interrupt Sharing (Default)

PinsInterrupt Function

MPA-100 User's Manual 5-1