System Overview
PEB-2530VL User’s Manual
1-7
1.3.9 Winbond
W83977F-A & D83977ATF-AW
The Winbond W83977F-A 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
Keyboard interface
PS/2 Mouse interface
Provision of buffered ISA data bus for BIOS (denoted
XDBus)
NVRAM with battery backup for BIOS configuration and real time clock
1.3.10
Compact Flash Interface
A Compact Flash type II connector is connected to the secondary IDE controller. The
Compact Flash storage card is IDE compatible. It is an ideal replacement for
standard IDE hard drives. The solid-state design offers no seek errors even under
extreme shock and vibration conditions. The Compact Flash storage card is
extremely small and highly suitable for rugged environments, thus providing an
excellent solution for mobile applications with space limitations. It is fully
compatible with all consumer applications designed for data storage PC card, PDA,
and Smart Cellular Phones, allowing simple use for the end user. The Compact Flash
storage card is O/S independent, thus offering an optimal solution for embedded
systems operating in non-standard computing environments. The Compact Flash
storage card is IDE compatible and offers various capacities.
The following block diagram shows the architecture and main components of PEB-
2530VL.
