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INTRODUCTION ............................................................................................................... 23
1.1
Features ...................................................................................................................................... 23
1.2
Ordering Information ................................................................................................................. 23
1.3
System Configuration................................................................................................................ 24
1.4
Block Diagram (Summary) ........................................................................................................ 25
1.5
Block Diagram (Detail)............................................................................................................... 26
1.5.1
V
4120A RISC processor core ......................................................................................................26
1.5.2
IBUS ..............................................................................................................................................27
1.5.3
System controller ...........................................................................................................................28
1.5.4
ATM cell processor ........................................................................................................................29
1.5.5
Ethernet controller .........................................................................................................................30
1.5.6
USB controller ...............................................................................................................................31
1.5.7
PCI controller.................................................................................................................................32
1.6
Pin Configuration (Bottom View) ............................................................................................. 33
1.7
Pin Function ............................................................................................................................... 37
1.7.1
Power supply .................................................................................................................................37
1.7.2
System PLL power supply .............................................................................................................37
1.7.3
USB PLL power supply..................................................................................................................37
1.7.4
System control interface ................................................................................................................38
1.7.5
Memory interface ...........................................................................................................................39
1.7.6
PCI interface..................................................................................................................................41
1.7.7
ATM interface ................................................................................................................................43
1.7.8
Ethernet interface ..........................................................................................................................45
1.7.9
USB interface ................................................................................................................................46
1.7.10 UART interface ..............................................................................................................................47
1.7.11 Micro Wire interface.......................................................................................................................47
1.7.12 Parallel port interface.....................................................................................................................47
1.7.13 Boundary scan interface ................................................................................................................47
1.7.14 I.C. - open .....................................................................................................................................48
1.7.15 I.C.- pull down...............................................................................................................................48
1.7.16 I.C. - pull down with resistor..........................................................................................................48
1.7.17 I.C. - pull up ..................................................................................................................................48
1.8
I/O Register Map......................................................................................................................... 49
1.9
Memory Map ............................................................................................................................... 53
1.10 Reset Configuration................................................................................................................... 54
1.11 Interrupts .................................................................................................................................... 55
1.12 Clock Control Unit ..................................................................................................................... 56
V
4120A ............................................................................................................................ 57
R
2.1
2.1.1
Internal block configuration............................................................................................................58
2.1.2
V
4120A registers .........................................................................................................................59
2.1.3
V
4120A instruction set overview ..................................................................................................60
2.1.4
Data formats and addressing.........................................................................................................61
2.1.5
Coprocessors (CP0) ......................................................................................................................63
CONTENTS
4120A ............................................................................................................... 57
Preliminary User's Manual S15543EJ1V0UM
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