PC745B/PC755BFS - Rev.1 – 01/11
PC745B AND PC755B PowerPC
TM
Microprocessors
Fact Sheet
PC745B and PC755B PowerPC microprocessors are high-performance, low-power, 32-bit implementations of the
PowerPC Reduced Instruction Set Computer (RISC) architecture, specially enhanced for embedded applications. The
PC755B and PC745B microprocessors differ only in that the PC755B features an enhanced, dedicated L2-cache
interface with on-chip L2-tags. Both are software compatible with the PowerPC603e microprocessor family and the
PC745B is pin-compatible as well. Both PC745B and PC755B are fully JTAG compliant.
PC745B and PC755B Main Features
n
Six independent execution units
-
-
-
-
-
2 Integer Units sharing 32 General Purpose Registers
Floating Point Unit using a 32-entry FPR file
Branch Processing Unit : 4 instructions fetched per clock
Load/Store Unit
System Register Unit
32-Kbytes, physically addressed, Instruction and Data caches
8-way set associative Instruction and Data caches
Dedicated L2-cache with on-chip L2 tags (PC755B only)
Separate Instruction and Data MMUs
Virtual memory support up to 4 Petabytes (2
52
)
Completion
Real memory support up to 4 Gigabytes (2
32
)
Unit
128-entry instruction and data TLBs
n
Cache and MMU support
-
-
-
-
-
-
-
Dispatch
Unit
Branch
Unit
Integer
Unit
Gen Gen
Reg Re-
File name
Load/
Store
Unit
FPU
Reg
File
Floating
Point
Unit
D MMU
Data Cache
I MMU
Inst. Cache
Bus Interface Unit
L2
tags
32bit
Address
System Bus
32/64bit
Data
L2 Cache
Port (755 only)
L2 Data Bus
•
Bus Interface
- Compatible with 60x processor interface
- 32-bit address bus
- 64-bit data bus, 32-bit mode selectable
- 13 Bus-to-Core frequency multipliers
- Selectable interface voltages
CPU Summary
Die Revision
CPU Speeds -
Internal
CPU Bus Dividers
Bus Interface
Instructions per
Clock
L1 Cache
L2 Cache
Core-to-L2
Frequency Divisions
Typ/Max Power
Dissipation
Die Size
Package
Process
Voltage
SPECint95
(estimated)
SPECfp95
(estimated)
Other Performance
Status
Samples
Production
PC745B
300 - 350 MHz
2.7 = D
300 MHz
350 MHz
PC755B
300 - 400 MHz
•
Power Management
- Low-power design
- Selectable 1.8V/2.0V interface voltage
- 3 static power saving modes : doze, nap and sleep
- Dynamic power management
- Integrated thermal management unit
2.7 = D
300 MHz
350 MHz
400 MHz
2x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 2x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x,
6x, 6.5x, 7x, 7.5x, 8x, 10x
6x, 6.5x, 7x, 7.5x, 8x, 10x
32-bit address, 32/64-bit data 32-bit address, 32/64-bit data
3 (2+Branch)
3 (2+Branch)
32-KB Instruction and Data
-
-
4.0W/5.7W @ 350 MHz
51 mm
255-pin Flip-Chip PBGA
Ceramic Package if
Identifications
0.22
µ
CMOS, 5LM
1.8/2.0 or 3.3V I/O
2.0V internal
15.7 @ 350 MHz
11.6 @ 350 MHz
641 MIPS @ 350 MHz
Active
Now
Now
Integer (2)
Floating Point Unit
Branch Unit
Load/Store Unit
System Register
2
32-KB Instruction and Data
256KB, 512KB, 1MB
1:1, 1.5:1, 2:1, 2.5:1, 3:1
4.4W/6.4W @ 400 MHz
51 mm
360-pin Flip-Chip PBGA
Ceramic Package if
Identifications
0.22
µ
CMOS, 5LM
1.8/2.0 or 3.3V I/O
2.0V internal
18.1 @ 400MHz
12.3 @ 400MHz
733 MIPS @ 400MHz
Active
Now
Now
Integer (2)
Floating Point Unit
Branch Unit
Load/Store Unit
System Register
2
•
Packaging
-
255 Flip-Chip PBGA (PC745B)
- 360 Flip-Chip PBGA (PC755B)
- 255 and 360 CBGA available upon request
•
Screening
-
FC-PBGA upscreening based upon
ATMEL-Grenoble standards
- Full Military temperature range (Tj = -55°C, + 125°C)
- Industrial temperature range (Tj = -40°C, +110°C)
Execution Units
PC755B
Type
(PCX755B if prototype)
Temperature range : Tj
M: -55, +125°C
V: -40, +110°C
Package:
ZF: FC-PBGA
M
ZF
U
300
L
x
Revision level
D: Rev. 2.7
E: Rev 2.8
Bus divider
(to be confirmed)
L: Any valid PLL configuration
Max internal processor speed
Screening level:
U: UpscreeningTest
300: 300 MHz
350: 350 MHz
400: 400 MHz, TBC
For additional information:
contact your local ATMEL-Grenoble representative
or visit our web site at http://www.atmel-grenoble.com
You may also contact the PowerPC technical hotline at std.hotline@atmel-grenoble.com
The PowerPC and PowerPC603e names and the PowerPC logotype are trademarks of
International Business Machines Corporation, used under license therefrom.
BP123 - 38521 Saint- Egrève Cedex - France - Tel: +33 (0)4 76 58 30 00 - Fax: +33 (0)4 76 58 34 80