Kontron VMP1 with Netbootloader Manuel d'utilisateur télécharger pdf (Page 50)

VMP1 Configuration

ID 26037, Rev. 01Page 4 - 4 ® 2002 PEP Modular Computers GmbH

4.1.3 Resistor Setting for Non-standard Socket Devices

The default pinout of this socket is designed for use with standard DIL Flashes and M-

Systems DiskOnChip. As some devices have a different pinout, resistors must be set

accordingly (please see figure 2-4 for an illustration of these resistors on the board)

Note: All resistors are 0 ohms

4.1.4 RS485 Termination (Onboard Interface Only)

When the VMP1 is using the onboard RS485 interface and is the last on the RS485 bus,

then the RS485 interface must provide termination resistance. The purpose of J3 is to

enable this line termination resistor (130 R).

Additionally, the correct idle line potential must be provided at one location within the

RS485 bus. J4 and J5 are used for this purpose. Pullup/Pulldown resistors are 380 Ohm

each.

Table 4-2: Resistor Setting for Various Non-standard Socket Devices

Used Socket Devices R3 R6 R7 R8 R11 R12 R13

Flash (default) Open Open Open Set Set Open Set

DiskOnChip (default) Open Open Open Set Set Open Set

NVSRAM Open Open Set Open Set Set Open

4 Mbit EPROM Set Set Open Open Open Open Set

Table 4-3: Jumper Settings for RS485 Termination

Termination J3

ON Set

OFF Open



Note:

Ensure that the reference potential for the RS485 signals are set

in one location only on the bus.

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Kontron VMP1 with Netbootloader Manuel d'utilisateur Page 50