Technical data

Hardware
30 VIPA GmbH CP486 ⋅ 00/14
2.4 Installation of Chip Silicon Disk
The module contains 2 bases (IC3 and IC4) for special memory chips. The bases for the silicon disk
must be respectively assembled and the jumpers set up.
Jumper setup differs for the various base PCB (printed circuit board) versions.
Battery Backup of the Chip Silicon Disk SRAM:
The silicon disk SRAM can be operated battery backed-up. The battery back-up is adjusted via a
solder board (below DIP switch S1) for the modules 7458V24/7459V24 (PCB 5012V14):
PCB 5012V14
Setting: 1-2 closed 2-3 open Silicon disk is battery-backed
(permitted only for silicon disk SRAM)
1-2 open 2-3 closed Silicon disk is not battery-backed (standard setting)
For the modules 7458V25/7459V25 (PCB 5012V15) , 7458V26/7459V26 (PCB 5012V16) and the
modules 7458V27/7459V27 (PCB 5012V17) the battery back-up is set up via jumper Y23 (in the
bases of the silicon disk chips IC3 and IC4):
RAM UBAT RAM UBAT
OO O O
SD O O BUS SD O O BUS
OO O O
Y23 ROM VCC Y23 ROM VCC
Chip silicon disk is not battery backed-up Chip silicon disk is battery backed-up
Started with the PCB 5012V17, the pin X16/B29 can be switched over from 5V power supply (in
VCC position) to battery supply (in position UBAT) additionally via the jumper "BUS". Standard
adjustment is in position VCC!. The position UBAT is required only to run special VIPA memory
modules (e.g. 7MB silicon disk module).
Attention: A wrong configuration can cause malfunctions and defects.