System Overview
PEB-7431VL User’s Manual
1-6
1.4.5 IDE
Interface
A primary as well as a secondary IDE controller is provided by the STPC Atlas
system on chip which supports Ultra DMA mode and PCI bus mastering for the data
transfer.
Access to the STPC Atlas is provided by two standard IDE 40-pin connector and a
Compact Flash type II connector on the solder side of this board.
1.4.6 Ethernet
The Ethernet interfaces are based on one Realtek 8139C Ethernet controller, which
support both 100Mbit as well as l0Mbit Base-T interface.
The Ethernet controllers are attached to the PCI bus and use PCI bus mastering for
data transfer. The CPU is thereby not loaded during the actual data transfer.
1.4.7
STPC Atlas and Winbond W83977F-A
The STPC Atlas integrated Super I/O chip provides most input / output interfaces
of the system as the following:
COM 1 & 2. Operates in RS-232 mode through a charge pump driver. Only 5V
supply is required
COM 3 & 4. A RS422/RS485 driver is used whereby RS-422 and RS-485 are
provided. Selection of the mode is made by hardware jumper. Driver uses charge
pumps whereby only +5V is required
LPT. Support for SPP, EPP and ECP modes
Floppy interface
PS/2 Keyboard& Mouse interface
Provision of buffered ISA data bus for BIOS
NVRAM with battery backup for BIOS configuration and real time clock
Watchdog timer
