Sram Data Retention; Berr1 Timeout; Backup Current Test Bridge - PEP VM162 User Manual

VM162/VM172

3.3.8 SRAM Data Retention

The battery backup of the VM162/VM172 is connected to both the SRAM and RTC. This jumper gives
the user the possibility to disconnect the SRAM from the battery backup, giving the RTC longer backup
support.
Jumper
J16

3.3.9 BERR1 Timeout

This jumper sets the timeout of the BERR1 and can be used for debugging purposes.
Jumper
J17
J17, J18, J21 Set
Open
Open
Open

3.3.10 Backup Current Test Bridge

This jumper is reserved for support usage.
Jumper
J22
Page 3- 10
Setting Description
1-2 SRAM data retention is off
1-3 SRAM data retention is on
Setting
J18 J21
Open Open
Set Open
Open Set
Open Open
Setting Description
Set Operating mode
Open Test mode
© PEP Modular Computers
Chapter 3 Configuration
Description
8µs BERR1 tineout
32µs BERR1 timeout
128µs BERR1 timeout
Infinite BERR1 timeout
Default
Default
Juli 23, 1997