a
ICE-Port is a trademark of Analog Devices, Inc.
DSP Microcomputer
ADSP-218xN Series
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
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Fax: 781.461.3113
2006 Analog Devices, Inc. All rights reserved.
PERFORMANCE FEATURES
12.5 ns Instruction cycle time @1.8 V (internal), 80 MIPS sus-
tained performance
Single-cycle instruction execution
Single-cycle context switch
3-bus architecture allows dual operand fetches in every
instruction cycle
Multifunction instructions
Power-down mode featuring low CMOS standby power dissi-
pation with 200 CLKIN cycle recovery from power-down
condition
Low power dissipation in idle mode
INTEGRATION FEATURES
ADSP-2100 family code compatible (easy to use algebraic
syntax), with instruction set extensions
Up to 256K byte of on-chip RAM, configured
Up to 48K words program memory RAM
Up to 56K words data memory RAM
Dual-purpose program memory for both instruction and
data storage
Independent ALU, multiplier/accumulator, and barrel shifter
computational units
Two independent data address generators
Powerful program sequencer provides zero overhead loop-
ing conditional instruction execution
Programmable 16-bit interval timer with prescaler
100-lead LQFP and 144-ball BGA
SYSTEM INTERFACE FEATURES
Flexible I/O allows 1.8 V, 2.5 V or 3.3 V operation
All inputs tolerate up to 3.6 V regardless of mode
16-bit internal DMA port for high-speed access to on-chip
memory (mode selectable)
4M-byte memory interface for storage of data tables and pro-
gram overlays (mode selectable)
8-bit DMA to byte memory for transparent program and data
memory transfers (mode selectable)
Programmable memory strobe and separate I/O memory
space permits “glueless” system design
Programmable wait state generation
Two double-buffered serial ports with companding hardware
and automatic data buffering
Automatic booting of on-chip program memory from byte-
wide external memory, for example, EPROM, or through
internal DMA Port
Six external interrupts
13 programmable flag pins provide flexible system signaling
UART emulation through software SPORT reconfiguration
ICE-Port emulator interface supports debugging in final
systems
Figure 1. Functional Block Diagram
A R ITH M E TIC UN ITS
SH IFTE R
MAC
ALU
P R O GRAM M EM O RY ADDR ES S
DATA M EM O RY ADD RES S
PR O GRAM M EMO R Y DATA
DA TA ME MOR Y DA TA
PO W E R-DO WN
CONTRO L
MEM OR Y
PRO GRA M
ME M ORY
UP T O
48K
24-B IT
EX TE RNAL
ADDRES S
BUS
EX TE RNAL
DATA
BUS
BY TE DM A
CONT ROLL ER
SP OR T0
S ERIAL PO RTS
SP OR T 1
PROG RA MM ABL E
I/O
AND
FLA GS
TIM E R
HOS T M ODE
OR
EX TE RNAL
DATA
BUS
INTER NA L
DM A
PORT
DAG1
DAT A ADDRES S
G ENERAT OR S
DAG2
PROG RAM
SEQ U ENCER
ADS P-2100 B AS E
ARCHIT ECT UR E
DATA
ME M ORY
UP T O
56K
16-B IT
FU L L M EMOR Y MOD E