Specifications

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EPC-30 Hardware Reference
Page 35
Timer/Counters (3) 82C54-Compatible Programmable Interval Timer with
enhancements to allow remapping of peripheral addresses &
interrupt assignments.
Asynchronous
Serial Ports (2)
NS16450 Compatible UART. All interrupts may be connected to
the interrupt controller or two may be connected to the DMA
controller.
Intel386 EX
Embedded
Extensions
DMA Controller PC-Compatible to a certain extent. Backward compatible with
8237A. Two independent DMA channels can be 8 or 16 bits
wide.
Clock & Power
Management Unit
Provides a programmable clock signal for EX core and for
peripherals. Power management capability provides idle (stops
CPU clock; peripheral clock runs) and powerdown (both CPU
and peripheral clocks stopped) modes.
Watchdog Timer General purpose 32-bit timer.
Synchronous Serial
Port (1)
Provides bi-directional serial I/O up to 5 Mbps. Built-in protocols
are not included. Synchronous serial IO interrupts may be
connected to the DMA controller for high-speed transfers.
Parallel I/O Port
Programmable Chip
Select Units (8)
DRAM Refresh
Control
Generates periodic refresh requests and refresh addresses.
JTAG Test-logic Simplifies board level testing. Fully compliant with IEEE Std
1149.1-1990.
RadiSys
R380EX
PC-Compatible
Features
Real Time Clock Provides Motorola 146818A-compatible real time clock and
alarm with 114 bytes of battery-backed CMOS memory. The
RTC also generates a periodic interrupt. Access to the CMOS
memory is through registers 070h and 071h in an index/data
fashion. The Real-time clock is enabled or disabled by bootstrap
pins on the R380EX.
Keyboard/Mouse
Controller
Implements a 8042-Compatible keyboard controller with
extensions to support a PS/2 mouse. The controller is enabled or
disabled by bootstrap pins on the R380EX.
PC Speaker/”Port
B” Functionality
Port B register is located at 061h.
R380EX
Core System
Support Features
DRAM Refresh
Controller
Supports two banks of SIMMs as FPM, EDO or Flash SIMMs.
Second bank start address is configurable. Supports EDO/FPM
memory type detection.
Power Management
Support
Supports Power Management with Halt detection logic, SMI
generation logic, and glitchless clock switching.
ROM/Flash ROM
Controller
Supports SIMM-style Flash.
Digital IO Port 16 General-purpose I/O bits.
Programmable Chip
Select Units (4)
Control for ISA Bus peripheral devices.
IDE Interface Supports EIDE transfer modes (PIO4). Located at 01F0h.
LED Control Control for two pins/external indicators available