| Products SA-110 Microprocessor
Powerful
technology for emerging embedded consumer applications
The SA-110 StrongARM™ microprocessor is optimized for embedded
consumer applications. Featuring superior power efficiency, low cost, and high performance, the SA-110 can be an impressive choice for intelligent adapter
cards, switches, routers, printers, scanners, RAID controllers, process control
applications, set-top boxes, thin clients, Windows* terminals, and other emerging consumer applications.
The first StrongARM
family processor, the SA-110, provides powerful performance in a low-power chip.
Operating at speeds from 100 MHz to 233 MHz, the SA-110 features high performance and power dissipation from less than 300 milliwatts (mW) to less
than 1,000 mW.
High
performance and low cost for embedded applications
The SA-110
microprocessor is an impressive choice for many 32-bit embedded products. SA-110
microprocessors can deliver the performance needed to do routing calculations and move data in
internetworking applications, improve I/O throughput and offer PCI connectivity in
intelligent I/O applications. The SA-110 offers impressive MIPS-per-dollar, with a range of
CPU performances, a complete suite of development tools, and real-time operating systems
for office automation and process control applications.
SA-110 for smart handheld products
The SA-110 and its core logic chip, the 21285, offer the right mix of
integration, PCI connectivity and Intelligent I/O features. A robust
software environment makes the design of StrongARM microprocessor-based products for
embedded applications fast and easy. StrongARM processors are supported by a full suite of
real-time operating systems from leading third-party software vendors.
Power-saving
features enable portable products
The SA-110 can help fulfill the
increasing performance requirements of emerging portable products while satisfying the
stringent power constraints of battery-operated devices. Using SA-110 processors,
suppliers can deliver new and enhanced functions in handheld personal computers (HPCs),
mobile phones, organizers, and other consumer devices.
Advanced power-saving technologies
StrongARM
features a low-voltage process and integration
of advanced power-saving features and design techniques. StrongARM’s 2.0-volt nominal
process technology, which allows operation at either 1.65 volts or 2.0 volts, is key to
the SA-110’s MIPS/watt advantage. Operating at 2.0 volts, the SA-110 features power
dissipation savings of 80 percent compared to the power dissipation of 3.3-volt parts. At
the same time, the SA-110 provides flexibility to interface easily with 3.3-volt
peripherals by providing I/O pin compatibility with 3.3-volt signals. Extensive use of
independent conditional-clocking trees provides additional power savings.
Flexible system bus design
StrongARM’s
programmable system interface gives suppliers the flexibility to design their products to
the specific requirements of their applications. The SA-110 interface can operate in
synchronous or asynchronous mode and is programmable within a range of frequencies. In
synchronous mode, the interface can be programmed at 1/9 to 1/2 of the pipeline
frequency–up to 66 MHz. This flexibility allows OEMs to interface to a range of
memory systems for high-performance solutions or less expensive designs. In asynchronous
mode, the interface can operate at any speed up to 66 MHz, providing additional
flexibility.
21285 core
logic optimizes overall performance
The
21285 Core Logic greatly expands application possibilities and optimizes overall product
performance. The 21285 provides a single-chip interface between an SA-110 microprocessor,
synchronous DRAM, Flash ROM and the PCI bus. Integrated features include DMA and interrupt
controllers, programmable timers, intelligent I/O (I2O) unit, parallel and serial ports,
and a PCI bus arbiter. The 21285 enables designers to take advantage of the high speed of
the PCI bus for demanding applications.
Development
environment speeds time-to-market
A robust development environment, incorporating familiar ARM™* tools and an
evaluation board kit helps OEMs and third-party software application
providers incorporate the SA-110 microprocessor and the 21285 Core Logic Chip into their
products rapidly. The suite of ARM software tools aids developers in generating and
running benchmarks on software, simulating processors and memory, downloading computer
code to target hard-ware, and debugging code quickly and efficiently. The tools are
compatible with MS-DOS� , UNIX � (SunOS),UNIX (HP), Windows 3.1™,Windows NT™
(Intel) Windows NT (Alpha), and Windows 95 ™.
Benefits
- High-performance,
low-power technology enables manufacturers to compete effectively in the rapidly
expanding embedded consumer application market segment
- Unparalleled
performance in a low-power design enables new and advanced HPCs, mobile phones, and other
portable devices
- Industry leading
price/performance delivers the multimedia/ graphics capabilities demanded by Internet
access devices
- Compatibility with ARM
and availability of key third-party development tools and runtime operating systems (RTOS)
reduces design efforts and cost, speeding time to market
| Specifications |
| |
Low Power |
|
High
Performance |
|
|
| Clock |
100 MHz |
160 MHz |
166 MHz |
200 MHz |
233 MHz |
| Performance |
115 |
185 |
192 |
230 |
268 |
| Power
dissipation |
<300
mW |
<450
mW |
<450
mW |
<900
mW |
<1000
mW |
| MIPS/Watt
|
383 |
411 |
N/A |
N/A |
N/A |
| Power supply |
| Core |
1.65
V |
1.65
V |
V
2.0 |
2.0
V |
2.0
V |
| I/O |
Vddx = 3.3 V 6 10% |
| Operation modes |
| Normal
|
<300
mW |
<450
mW |
<450
mW |
<900
mW |
<1000
mW |
| Idle
|
<20
mW* |
<20
mW* |
N/A |
N/A |
N/A |
| Sleep |
<50
uA** |
<50
uA** |
N/A |
N/A |
N/A |
| Memory bus |
| Bus
width |
32
bits |
32
bits |
32
bits |
32
bits |
32
bits |
| Programmable bus clocking synchronous mode (MHz) |
| /2 |
50.0 |
— |
— |
— |
— |
| /3 |
33.3 |
53.3 |
66 |
— |
— |
| /4 |
25.0 |
40.0 |
41.5 |
50.0 |
58.2 |
| /5 |
20.0 |
32.0 |
33.2 |
40.0 |
46.6 |
| /6 |
16.6 |
26.6 |
27.6 |
33.3 |
38.8 |
| /7 |
14.2 |
22.8 |
23.7 |
28.6 |
33.3 |
| /8 |
12.5 |
20.0 |
20.7 |
25.0 |
29.1 |
| /9 |
11.1 |
17.8 |
18.4 |
22.2 |
25.8 |
| Asynchronous mode External input — variable up to 66 MHz |
| Operating temperature range |
0�C
to 70�C |
0�C
to 70�C |
0�C
to 70�C |
0�C
to 70�C |
| Storage temperature range |
-40�C
to 125�C |
-40�C
to 125�C |
-40�C
to 125�C |
-40�C
to 125�C |
* MCLK/CCLKK are off, PLL is on
** Vdd is off, PLL is off, O and I/Os are driven to a zero deasserted state |
| Clocking methodolgy |
|
| External reference |
3.68MHz crystal oscillator |
| Internal PLL Configurable |
100 MHz, 160 MHz, 200 MHz |
| Processor microarchitecture |
|
| Integer pipeline |
5-stage pipeline |
| On-chip data cache |
16kB write-back, 32-way set associative |
| On-chip instruction cache |
16kB 32-way set associative |
| Write buffer |
8 entries x 16 bytes/entry |
| MMU |
32-entry IMMU/32-entry DMMU fully
associative, each entry maps 4KB,64KB, or 1MB |
| Multiply signed or unsigned (12-bit
multiplier with early termination) |
|
| 32x32 (32-bit result) |
2-4 cycles (dependent on magnitude of
operands) |
| 32x32+32 (32-bit result) |
2-4 cycles (dependent on magnitude of
operands) |
| 32x32 (64-bit result |
3-5 cycles (dependent on magnitude of
operands) |
| 32x32+64 (64-bit result) |
3-5 cycles (dependent on magnitude of
operands) |
| Virtual addressing |
32 bits |
| Physical addressing |
32 bits |
| Manufacturing information |
|
| Process technology |
0.35 um, 3-layer metal |
| Manufacturing line |
DIGITAL’s FAB6, 8-inch wafer line |
| Die size |
50 mm2 |
| Transistor count |
2.1 million |
| Package |
144-pin LQFP* |
| * Note: the LQFP package is
1.4 mm thick. |
Ordering
Information
Part
Frequency
Order #
SA-110 100MHz
21281-BA
SA-110 160MHz
21281-AA
SA-110 200MHz
21281-CA
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