User`s manual

Am186™CC Microcontroller Router Reference Design User’s Manual
2-29
The interface between the reference design and the TIP is set up so it does not use
many Am186CC microcontroller resources. The general interface between the
Am186CC microcontroller router reference design and TIP is as follows:
• A19–A0, AD7–AD0, RD
, and WLB on the Am186CC microcontroller are used
to provide communication between the TIP peripherals and the router reference
design.
•The UCS
signal on the Am186CC microcontroller provides a specific chip select
to the 8-bit Flash memory on the TIP. When selecting the TIP as a boot device,
the UCS
signal must be routed to the TIP Flash memory. See Table 2-2 and
Table 2-3 on page 2-4 for configuration jumper settings for Flash memory boot
options.
• INT0 on the Am186CC microcontroller is used as the TIP Ethernet interrupt
signal.
• INT7 on the Am186CC microcontroller is used as the TIP serial port 1 interrupt
signal.
• INT8 on the Am186CC microcontroller is used as the TIP serial port 0 interrupt
signal.
•PCS3
on the Am186CC microcontroller is used as a chip select (AEN) for the
TIP Ethernet controller.
NOTE: AD7 is also individually interfaced to the TIP board to identify the TIP
being attached through the Am186CC microcontroller RESCON register (see page
2-30).
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