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RM7065A Schematic ( PDF Datasheet ) - PMC-Sierra

Teilenummer RM7065A
Beschreibung Microprocessor
Hersteller PMC-Sierra
Logo PMC-Sierra Logo 




Gesamt 30 Seiten
RM7065A Datasheet, Funktion
RM7065AMicroprocessor with On-Chip Secondary Cache Data Sheet
Preliminary
RM7065A
RM7065AMicroprocessor with On-
Chip Secondary Cache
Data Sheet
Preliminary
Issue 2, June 2001
Proprietary and Confidential to PMC-Sierra, Inc and for its Customers Internal Use
Document ID: PMC-2010145, Issue 2






RM7065A Datasheet, Funktion
RM7065AMicroprocessor with On-Chip Secondary Cache Data Sheet
Preliminary
4.36 JTAG Interface .............................................................................................................36
4.37 Boot-Time Options .......................................................................................................36
4.38 Boot-Time Modes .........................................................................................................36
5 Pin Descriptions ....................................................................................................................38
6 Absolute Maximum Ratings ..................................................................................................41
7 Recommended Operating Conditions ...................................................................................42
8 DC Electrical Characteristics .................................................................................................43
9 Power Consumption ..............................................................................................................44
10 AC Electrical Characteristics .................................................................................................45
10.1 Capacitive Load Deration .............................................................................................45
10.2 Clock Parameters ........................................................................................................45
10.3 System Interface Parameters ......................................................................................46
10.4 Boot-Time Interface Parameters ..................................................................................46
11 Timing Diagrams ...................................................................................................................47
11.1 Clock Timing ................................................................................................................47
12 Packaging Information ..........................................................................................................48
13 RM7065A Pinout ...................................................................................................................50
14 Ordering Information .............................................................................................................52
Proprietary and Confidential to PMC-Sierra, Inc and for its Customers Internal Use
Document ID: PMC-2010145, Issue 2
6

6 Page









RM7065A pdf, datenblatt
RM7065AMicroprocessor with On-Chip Secondary Cache Data Sheet
Preliminary
4 Hardware Overview
The RM7065A offers a high-level of integration targeted at high-performance embedded
applications. The key elements of the RM7065A are described throughout this section.
4.1 CPU Registers
The RM7065A CPU contains 32 general purpose registers (GPR), two special purpose registers
for integer multiplication and division, and a program counter; there are no condition code bits.
Figure 2 shows the user visible state.
Figure 2 CP0 Registers
General Purpose Registers
63 0
0
r1
r2
r29
r30
r31
Multiply/Divide Registers
63
HI
63
LO
0
0
Program Counter
63
PC
0
4.2 Superscalar Dispatch
The RM7065A incorporates a superscalar dispatch unit that allows it to issue up to two
instructions per cycle. For purposes of instruction issue, the RM7065A defines four classes of
instructions: integer, load/store, branches, and floating-point. There are two logical pipelines, the
function, or F, pipeline and the memory, or M, pipeline. Note however that the M pipe can execute
integer as well as memory type instructions.
Table 1 Instruction Issue Rules
F Pipe
M Pipe
one of:
one of:
integer, branch, floating-point, integer, load/store
integer mul, div
Proprietary and Confidential to PMC-Sierra, Inc and for its Customers Internal Use
Document ID: PMC-2010145, Issue 2
12

12 Page





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