AM186ES Advanced Micro Devices, AM186ES Datasheet - Page 35

• Manufacturer Part Number: AM186ES
• Description: microcontrollers provide a low-cost/ high-performance solution for embedded system designers who wish to use the x86 architecture.
• Manufacturer: Advanced Micro Devices

The chip select lines are active for all memory and I/O
cycles in their programmed areas, whether they are
generated by the CPU or by the integrated DMA unit.
General enhancements over the original 80C186
include bus mastering (three-state) support for all chip
selects and activation only when the associated
register is written, not when it is read.
CLKOUT
A19–A0
AD15–AD0
AD15–AD0
LCS or UCS
MCSx, PCSx
(Read)
(Write)
Figure 3. Am186CC Controller Address Bus — Default Operation
Am186™CC Communications Controller Data Sheet
Address
Phase
t
Address
1
Address
Clock Control
The processor supports clock rates from 16 to 50 MHz
using an integrated cr ystal oscillator and PLL.
Commercial and industrial temperature ratings are
available. Separate cr ystal oscillator inputs are
provided for the USB and CPU. Flexibility is provided to
run the entire device from a 12-, or 24-MHz crystal
when the USB is in use. The CPU can run in 1x, 2x, or
4x mode; USB can run in 2x or 4x mode.
Address
t
2
Phase
Data
t
3
Data
Data
t
4
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