Table of Contents
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Section 1
1.1
Q2 Overview...................................................................................................
1.2
Block Diagram.................................................................................................
1.3
Concepts ........................................................................................................
1.3.1
Simplicity (Optimization of System Configuration) ....................................
1.3.2
Realtime Operation................................................................................
1.3.3
Upgradability........................................................................................
1.4
Summary of Functions......................................................................................
Section 2
................................................................................................... 11
2.1
Pin Arrangement and Functions .......................................................................... 11
2.1.1
Overview of Pins .................................................................................. 11
2.1.2
Pin Arrangement................................................................................... 12
2.1.3
Pin Functions....................................................................................... 13
2.2
Operating Mode Pins ........................................................................................ 19
2.3
CPU Interface Pins........................................................................................... 20
2.3.1
CPU Writes ......................................................................................... 20
2.3.2
Reads .......................................................................................... 21
2.3.3
Writes ........................................................................................ 21
2.3.4
Interrupts............................................................................................. 21
2.4
Power Supply Pins........................................................................................... 22
2.4.1
Normal Power Supply and PLL Power Supply ........................................... 22
2.4.2
CPU Power Supply ............................................................................... 22
2.5
Display Interface Pins ....................................................................................... 22
2.5.1
DAC Interface....................................................................................... 22
2.5.2
Video Encoder Interface........................................................................... 23
2.5.3
CRT Interface....................................................................................... 23
2.6
UGM Interface Pins.......................................................................................... 23
2.6.1
UGM Access........................................................................................ 23
Section 3
3.1
Clocks ........................................................................................................... 25
3.2
UGM (Unified Graphics Memory) Control............................................................ 26
3.2.1
Overview............................................................................................. 26
3.2.2
Memory Access .................................................................................... 27
3.2.3
Memory Map ....................................................................................... 28
3.3
Display and Display Control .............................................................................. 35
3.3.1
Overview............................................................................................. 35
3.3.2
Double-Buffering Control ....................................................................... 35
Contents
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