CONTENTS
OVERVIEW ................................................................................................... 1
1.1
MB91F109 Characteristics .................................................................................................................... 2
1.2
1.3
Outside Dimensions ............................................................................................................................... 7
1.4
Pin Arrangement Diagrams ................................................................................................................. 10
1.5
Pin Functions ....................................................................................................................................... 14
1.6
I/O Circuit Format ................................................................................................................................ 22
1.7
Memory Address Space ...................................................................................................................... 24
1.8
Handling of Devices ............................................................................................................................. 26
CPU ............................................................................................................. 29
2.1
CPU Architecture ................................................................................................................................. 30
2.2
Internal Architecture ............................................................................................................................. 31
2.3
Programming Model ............................................................................................................................ 33
2.3.1
General-Purpose Registers ............................................................................................................ 35
2.3.2
Special Registers ............................................................................................................................ 36
2.3.3
2.4
Data Structure ...................................................................................................................................... 42
2.5
Word Alignment ................................................................................................................................... 43
2.6
Memory Map ........................................................................................................................................ 44
2.7
Instruction Overview ............................................................................................................................ 46
2.7.1
2.7.2
2.8
2.8.1
EIT Interrupt Levels ........................................................................................................................ 54
2.8.2
2.8.3
System Stack Pointer (SSP) ........................................................................................................... 57
2.8.4
Interrupt Stack ................................................................................................................................ 58
2.8.5
Table Base Register (TBR) ............................................................................................................ 59
2.8.6
EIT Vector Table ............................................................................................................................. 60
2.8.7
Multiple EIT Processing .................................................................................................................. 62
2.8.8
EIT Operation ................................................................................................................................. 64
2.9
Reset Sequence .................................................................................................................................. 68
2.10 Operation Mode ................................................................................................................................... 69
3.1
3.2
3.3
3.4
3.5
3.6
Gear Control Register (GCR) .............................................................................................................. 82
3.7
3.8
PLL Control Register (PCTR) .............................................................................................................. 86
vii