System Features
Bengal (VL-EPMe-30) Reference Manual
22
Real Time Clock (RTC)
The Bengal features a real-time clock/calendar (RTC) circuit. The RTC can be set using the BIOS
Setup utility.
The Bengal supplies RTC voltage in S5, S3, and S0 states, but requires an ex2.75 V to
+3.3 V battery connection to maintain RTC functionality and RTC CMOS RAM when the Bengal is
not powered. The battery connection can be made to either (but not both) of the following:
J8 battery connector
Pin 17 of the J18 connector
Integrator’s Note:
There is no on-board battery. The Bengal board will operate without a battery, but to save the
date and time, use a VL-CBR-5015 paddleboard (which includes a battery).
Expansion Bus
PCI
The Bengal provides a legacy stack-down PCI connector at location J11 on the bottom side of the
board. See the PCI sections of the
for a complete description of this
interface. The BIOS automatically allocates I/O, memory, and interrupt resources.
Table 7: PCI/104-Express
†
“B” Connector (PCI) Current Ratings
Signal
Current Rating
V5
4.0 A
V3P3_ATX
3.0 A
V12_ATX
1.0 A
V12N_ATX
0.5 A
PCIe/104
†
OneBank
†
The Bengal provides a high-speed stack-down PCIe/104 OneBank connector at location J10 on
the bottom side of the board. See the
description of this interface. Table 8 lists the interfaces provided by the OneBank connector.
Table 8: PCIe/104
†
OneBank
†
Interfaces
Feature
OneBank
USB 2.0
None supported
SMB
1
PCIe x1
2
Power
+3.3 V, +5 V
ATX Control
No
