Intel Embedded Intel486 User Manual

7-41
PERIPHERAL SUBSYSTEM
The 82596 coprocessor is an extension of the earlier 82586 LAN coprocessor, which interfaces
an Ethernet network to a 16-bit Intel bus. The 82596 coprocessor can be configured to run soft-
ware drivers written for the 82586 device without modification.
7.6.1.1 Hardware Interface
The 82596 coprocessor communicates with the rest of the system via two hardware interfaces:
the Intel486 processor bus (parallel) interface and the network (serial) interface, as shown in Fig-
ure 7-22. The signals for both interfaces are listed in Table 7-12. The coprocessor’s bus cycles
(including burst cycles), bus interface timing, bus arbitration method, and signal definitions are
compatible with the Intel486 processor. When the coprocessor is not holding the bus, its bus in-
terface signals are floated. The state machines for the Intel486 processor and the 82596 coproces-
sor are very similar.
Figure 7-22. 82596CA Application Example
Serial
Interface
82596
LAN
Controller
Processor Bus
Intel486™
Network Cable Media
Processor
BREQ
HLDA
HOLD

Intel Embedded Intel486 Specifications

General

Brand	Intel
Model	Embedded Intel486
Category	Computer Hardware
Language	English