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Daewoo DSN-300A - Page 11

Daewoo DSN-300A
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10
This micro-controller uses a reformed memory interface, ensuring both lower costs and high quality.
The memory interface control logic is designed perfectly asynchronously to the I/O control logic.
A 32-bit or 16-bit memory system can be used.
The DRAM controller is designed to drive even 4-bank DRAM directly.
The DMA channel, in which 3 programs can be operated, includes image, CRT and sound data.
There are 3 I/O cycle types as follows:

Simple I/O - fixed 8 MHz timing

Module I/O variable 8 MHz timing
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PC bus style I/O 32-bit, 16 MHz timing
Other characteristics are the AD converter channel and two serial keyboard mouse ports.
ARM7500
Top View
Pin 240 Pin 181
Pin 120Pin 61
Pin 60
Pin 121
Pin 1
Pin 180