PC7410
PowerPC 7410 RISC Microprocessor
Datasheet
Features
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22.8 SPECint95 (estimated), 17SPECfp95 at 500 MHz (estimated)
917MIPS at 500 MHz
Selectable Bus Clock (14 CPU Bus Dividers Up To 9x)
Seven Selectable Core-to-L2 Frequency Divisors
Selectable 603 Interface Voltage Below 3.3V (1.8V, 2.5V)
Selectable L2 interface of 1.8V or 2.5V
P
D
Typical 5.3W at 500 MHz, Full Operating Conditions
Nap, Doze and Sleep Modes for Power Saving
Superscalar (Four Instructions fetched per Clock Cycle)
4 GB Direct Addressing Range
Virtual Memory: 4 hexabytes (2
52
)
64-bit Data and 32-bit Address Bus Interface
32 KB Instruction and Data Cache
Eight Independent Execution Units and Three Register Files
Write-back and Write-through Operations
f
INT
Max = 450 MHz 500 MHz
f
BUS
Max = 133 MHz
Description
The PC7410 is the second microprocessor that uses the fourth (G4) full implementation of the PowerPC Reduced Instruc-
tion Set Computer (RISC) architecture. It is fully JTAG-compliant.
The PC7410 maintains some of the characteristics of G3 microprocessors:
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The design is superscalar, capable of issuing three instructions per clock cycle into eight independent execution units
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The microprocessor provides four software controllable power-saving modes and a thermal assist unit management
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The microprocessor has separate 32-Kbyte, physically-addressed instruction and data caches with dedicated L2 cache
interface with on-chip L2 tags
In addition, the PC7410 integrates full hardware-based multiprocessing capability, including a 5-state cache coherency pro-
tocol (4 MESI states plus a fifth state for shared intervention) and an implementation of the new AltiVec
®
technology
instruction set.
New features have been developed to make latency equal for double-precision and single-precision floating-point opera-
tions involving multiplication. Additionally, in memory subsystem (MSS) bandwidth, the PC7410 offers an optional, high-
bandwidth MPX bus interface.
Unlike the PC7400, the PC7410 does not support the 3.3V I/O on the L2 cache interface.
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e2v semiconductors SAS 2007
PC7410
Screening
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CBGA Upscreenings Based on e2v Standards
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Full Military Temperature Range (T
J
= -55° C, +125° C),
Industrial Temperature Range (T
J
= -40° C, +110° C)
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CI-CGA Package Version, HiTCE Package Version
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Figure 1-1.
1. Block Diagram
128 bits
(4 instructions)
Instruction Unit
Additional features
Time Base
Counter/Decrementer
Clock Multiplier
JTAG/COP Interface
Thermal/Power Management
Performance Monitor
2 Instructions
Instruction MMU
SRs
(Shadow)
128-entry
ITLB
IBAT
Array
Tags
32-Kbyte
iCache
Fetcher
Branch Processing Unit
64-entry BTIC/512-entry BHT
LR/CTR
PC7410 Microprocessor Block Diagram
Instruction
Queue
6-word
Data MMU
Dispatch Unit
EA
SRs
(Original)
PA
128-entry
DTLB
DBAT
Array
Tags
32-Kbyte
DCache
64-bit
(2 Instructions)
Reservation
Station
Reservation
Station
Reservation
Station
VR File
6 Rename
Buffers
Reservation
Station
Reservation
Station
GPR File
6 Rename
Buffers
32-bit
Reservation
Station
2-entry
FPR File
6 Rename
Buffers
Reservation
Station
Load/Store
Unit
- Add -
EA Calculation
Finished Stores
Completed
Stores
Vector
Permute
Unit
Vector
ALU
VSIU VCIU VFPU
Integer
Unit 1
Add-Multiply-
divide
Integer
Unit 2
- Add -
System
Register
Unit
64-bit
Floating
64-bit
Point Unit
Add-Multiply-
divide
FPSCR
VSCR
128-bit
32-bit
128-bit
32-bit
128 bits
Completion Unit
8-entry
Reorder Buffer
L2 Controller
L2 Data
L2 Tags
Transaction
L2CR
Queue
L2PMCR
Bus Interface Unit
L2 Miss
Data
Transaction
Queue
L2 Castout
Memory Subsystem
Data Reload
Data Reload
Buffer
Table
19-bit L2 Address Bus
64- or 32-bit L2 Data Bus
32-bit Address Bus
64-bit Data Bus
Instruction
Reload Buffer
Instruction
Reload Table
PC7410
3
PC7410
2. General Parameters
Table 2-1
provides a summary of the general parameters of the PC7410.
Table 2-1.
Parameter
Technology
Die size
Transistor count
Logic design
Device Parameters
Description
0.18 µm CMOS, six-layer metal
6.32 mm × 8.26 mm (52 mm
2
)
10.5 million
Fully-static
Surface-mount 360 Ceramic Ball Grid Array (CBGA)
Surface mount 360 high coefficient of thermal expansion
ceramic ball grid array (HiTCE)
Surface mount 360-column Ci-CGA Package
1.8V ± 100 mV dc or 1.5V ± 50 mV dc (nominal; see
Table 6-3 on page 11
for
Recommended Operating Conditions)
1.8V ± 100 mV dc or
2.5V ± 100 mV
3.3V ± 165 mV (603 bus only)
(1)
(input thresholds are configuration pin selectable)
Packages
Core power supply
I/O power supply
Note:
1. 3.3V I/O bus not supported for 1.5V core power supply processor version.
3. Overview
This section summarizes features of the PC7410’s implementation of the PowerPC architecture. Major
features of the PC7410 are as follows:
• Branch Processing Unit
– Four instructions fetched per clock
– One branch processed per cycle (plus resolving two speculations)
– Up to one speculative stream in execution, one additional speculative stream in fetch
– 512-entry Branch History Table (BHT) for dynamic prediction
– 64-entry, 4-way set associative Branch Target Instruction Cache (BTIC) for eliminating
branch delay slots
• Dispatch Unit
– Full hardware detection of dependencies (resolved in the execution units)
– Dispatch two instructions to eight independent units (system, branch, load/store, fixed-point
unit 1, fixed-point unit 2, floating-point, AltiVec permute, AltiVec ALU)
– Serialization control (predispatch, postdispatch, execution serialization)
• Decode
– Register file access
– Forwarding control
– Partial instruction decode
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PC7410
• Completion
– 8-entry completion buffer
– Instruction tracking and peak completion of two instructions per cycle
– Completion of instructions in program order while supporting out-of-order instruction
execution, completion serialization and all instruction flow changes
• Fixed-point Units (FXUs) that Share 32 GPRs for Integer Operands
– Fixed-point Unit 1 (FXU1): multiply, divide, shift, rotate, arithmetic, logical
– Fixed-point Unit 2 (FXU2)—shift, rotate, arithmetic, logical
– Single-cycle arithmetic, shifts, rotates, logical
– Multiply and divide support (multi-cycle)
– Early out multiply
• Three-stage Floating-point Unit and a 32-entry FPR File
– Support for IEEE-754 standard single- and double-precision floating-point arithmetic
– Three-cycle latency, one-cycle throughput (single or double precision)
– Hardware support for divide
– Hardware support for denormalized numbers
– Time deterministic non-IEEE mode
• System Unit
– Executes CR logical instructions and miscellaneous system instructions
– Special register transfer instructions
• AltiVec Unit
– Full 128-bit data paths
– Two dispatchable units: vector permute unit and vector ALU unit
– Contains its own 32-entry 128-bit Vector Register File (VRF) with six renames
– The vector ALU unit is further sub-divided into the Vector Simple Integer Unit (VSIU), the
Vector Complex Integer Unit (VCIU) and the Vector Floating-point Unit (VFPU)
– Fully pipelined
• Load/Store Unit
– One-cycle load or store cache access (byte, half-word, word, double-word)
– Two-cycle load latency with one-cycle throughput
– Effective address generation
– Hits under misses (multiple outstanding misses)
– Single-cycle unaligned access within double-word boundary
– Alignment, zero padding, sign extend for integer register file
– Floating-point internal format conversion (alignment, normalization)
– Sequencing for load/store multiples and string operations
– Store gathering
– Executes the cache and TLB instructions
– Big- and little-endian byte addressing supported
– Misaligned little-endian supported
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