MB86831
Fujitsu Microelectronics, Inc.
3
Table of Contents
General Discussion ...............................................................................................................................................................5
Pin Conguration.......................................................................................................................................................... 5
Block Diagram of MB8683........................................................................................................................................... 1 6
Ordering Code ...............................................................................................................................................................6
Pin Assignment—176-pin SQFP ......................................................................................................................................7
Signal Descriptions ........................................................................................................................................................8
Pin Status Description .................................................................................................................................................. 12
Access Type .................................................................................................................................................................. 12
Overview ........................................................................................................................................................................... 13
Key Features ................................................................................................................................................................ 13
Sleep Mode ........................................................................................................................................................... 14
MB86831 Instruction Set .............................................................................................................................................. 14
CPU .................................................................................................................................................................... 15
Address Space .............................................................................................................................................................. 15
Registers ..................................................................................................................................................................... 15
Instruction Sets ............................................................................................................................................................ 16
Interrupt .................................................................................................................................................................... 16
Cache ......................................................................................................................................................................... 17
Bus Interface ............................................................................................................................................................... 18
Interrupt Controller ..................................................................................................................................................... 18
Interrupt Trigger Modes ................................................................................................................................................ 18
Request Sense Register (Read only) ........................................................................................................................... 18
IRC Mode Register ................................................................................................................................................ 19
Interrupt Controller Modes ........................................................................................................................................... 19
Interrupt Controller Operation ............................................................................................................................... 20
CLOCK GENERATOR ................................................................................................................................................ 20
Clock Multiplication Factor .......................................................................................................................................... 20
DRAM CONTROLLER ................................................................................................................................................ 21
Programmable Chip Select ............................................................................................................................................. 21
Use of Chip Select ........................................................................................................................................................ 21
-CS0 .................................................................................................................................................................... 22
-CS1 and -CS2 ....................................................................................................................................................... 22
-CS3 .................................................................................................................................................................... 22
-CS4 .................................................................................................................................................................... 22
-CS5 .................................................................................................................................................................... 22