Datasheet
ADSP-21483/ADSP-21486/ADSP-21487/ADSP-21488/ADSP-21489
Rev. B | Page 3 of 68 | March 2013
GENERAL DESCRIPTION
The ADSP-2148x SHARC
®
processors are members of the
SIMD SHARC family of DSPs that feature Analog Devices’
Super Harvard Architecture. The processors are source code
compatible with the ADSP-2126x, ADSP-2136x, ADSP-2137x,
ADSP-2146x, ADSP-2147x and ADSP-2116x DSPs, as well as
with first generation ADSP-2106x SHARC processors in SISD
(single-instruction, single-data) mode. The ADSP-2148x pro-
cessors are 32-bit/40-bit floating point processors optimized for
high performance audio applications with large on-chip SRAM,
multiple internal buses to eliminate I/O bottlenecks, and an
innovative digital applications interface (DAI).
Table 1 shows performance benchmarks for the ADSP-2148x
processors. Table 2 shows the features of the individual product
offerings.
Table 1. Processor Benchmarks
Benchmark Algorithm
Speed
(at 400 MHz)
Speed
(at 450 MHz)
1024 Point Complex FFT
(Radix 4, with Reversal)
23 s 20.44 s
FIR Filter (per Tap)
1
1.25 ns 1.1 ns
IIR Filter (per Biquad)
1
5 ns 4.43 ns
Matrix Multiply (Pipelined)
[3 × 3] × [3 × 1]
[4 × 4] × [4 × 1]
11.25 ns
20 ns
10.0 ns
17.78 ns
Divide (y/×) 7.5 ns 6.67 ns
Inverse Square Root 11.25 ns 10.0 ns
1
Assumes two files in multichannel SIMD mode
Table 2. ADSP-2148x Family Features
Feature ADSP-21483 ADSP-21486 ADSP-21487 ADSP-21488 ADSP-21489
Maximum Instruction Rate 400 MHz 400 MHz 450 MHz 400 MHz 450 MHz
RAM 3 Mbits 5 Mbits 3 Mbits 5 Mbits
ROM 4 Mbits No
Audio Decoders in ROM
1
Yes No
Pulse-Width Modulation 4 Units (3 Units on 100-Lead Packages)
DTCP Hardware Accelerator Contact Analog Devices
External Port Interface (SDRAM, AMI)
2
Yes (16-bit) AMI Only Yes (16-bit)
Serial Ports 8
Direct DMA from SPORTs to External Port
(External Memory)
Yes
FIR, IIR, FFT Accelerator Yes
Watchdog Timer Yes (176-Lead Package Only)
MediaLB Interface Automotive Models Only
IDP/PDAP Yes
UART 1
DAI (SRU)/DPI (SRU2) Yes
S/PDIF Transceiver Yes
SPI Yes
TWI 1
SRC Performance
3
–128 dB
Thermal Diode Yes
VISA Support Yes
Package
2
176-Lead LQFP EPAD
100-Lead LQFP EPAD
176-Lead LQFP
EPAD
176-Lead LQFP EPAD
100-Lead LQFP EPAD
1
ROM is factory programmed with latest multichannel audio decoding and post-processing algorithms from Dolby
®
Labs and DTS
®
. Decoder/post-processor algorithm
combination support varies depending upon the chip version and the system configurations. Please visit www.analog.com for complete information.
2
The 100-lead packages do not contain an external port. The SDRAM controller pins must be disabled when using this package. For more information, see Pin Function
Descriptions on Page 14. The ADSP-21486 processor in the 176-lead package also does not contain a SDRAM controller. For more information, see 176-Lead LQFP_EP
Lead Assignment on page 60.
3
Some models have –140 dB performance. For more information, see Ordering Guide on page 66.