cs89712 Cirrus Logic, Inc., cs89712 Datasheet - Page 5
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cs89712
Manufacturer Part Number
cs89712
Description
High-performance, Low-power System-on-chip With 10base-t Ethernet Controller
Manufacturer
Cirrus Logic, Inc.
Datasheet
1.CS89712.pdf
(170 pages)
- Current page: 5 of 170
- Download datasheet (2Mb)
The CS89712 contains a single-chip embedded
controller designed to be used in low-cost and ul-
tra-low-power applications. Operating at 74 MHz,
the
2.1 MIPS sustained (74 MIPS peak).
The CS89712 contains the following features:
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DS502PP2
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ARM720T processor with:
Full 10BaseT Ethernet port, with all the analog
& digital circuitry needed for a complete Ether-
net circuit, having:
CS89712
ARM7TDMI CPU core (supporting the
Thumb instruction set and with enhanced
multiplier) running at a dynamic clock
speeds of 18, 36, 49, or 74 MHz
Advanced power management
Memory Management Unit compatible
with the ARM710 core (and a 64-entry
translation lookaside buffer) with added
support for Windows CE
8 kbytes of unified instruction/data cache
with a four-way set associative controller
Write buffer
JTAG, core debug and full embedded ICE
Media Access Control (MAC) IEEE 802.3
compliant full-duplex engine. It handles all
aspects of Ethernet frame transmission and
reception, including: collision detection,
preamble generation and detection, and
CRC generation and test. Features include
automatic retransmission on collision, and
automatic padding of transmitted frames.
4 kbyte page of on-chip memory, eliminat-
ing external memory chips.
serial EEPROM interface allowing config-
uration information storage for automatic
load at power-up.
A Manchester encoder/decoder, clock re-
covery circuit, and 10BASE-T transceiver.
delivers
about
66 Dhrystone
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48k bytes of on-chip SRAM sharable between
the LCD controller and general applications
Low power operation. Typical power dissipat-
ed is 270 mW at 74 MHz in the Operating State
and 160 mW in the Idle State (clock to the CPU
stopped, everything else running), with
<150 uW in the Standby State (realtime clock
‘on’, everything else stopped). The Ethernet
block has a Software Suspend state, disabling
the receiver and dropping current to the micro-
ampere range.
Advanced audio decoder / decompression sup-
ports multiple audio decompression algorithms
at all standard sample & bit rates. MPEG 1, 2,
and 2.5 layer 3 audio decoding is supported, in-
cluding ISO compliant MPEG 1 and 2 layer 3
support. Adaptive bit rates are supported.
Up to 64 MHz of SDRAM can operate at up to
36.864 MHz with 16- or 32-bit wide accesses.
ROM / SRAM / FLASH Memory controller de-
codes up to 5 separate memory segments each
up to 256 Mbytes. Each segment can be config-
ured as 8, 16, or 32 bits wide with page-mode
access support and programmable access times.
Supports removable FLASH card interface for
addition of expansion FLASH modules.
27 general-purpose I/O bits; three 8-bit and one
3-bit port support scanning keyboard matrix.
Digital Audio Interface (DAI) for interfacing to
CD-quality DACs and CODECs.
Interrupt controller.
IrDA 115.2 kbps SIR protocol controller.
It provides on-chip LED drivers for link sta-
tus, bus status, and Ethernet line activity.
10BASE-T transceiver including drivers,
receivers, and analog filters, for direct con-
nection to low-cost isolation transformers.
very low noise emission, shortening EMI
testing and qualification time.
CS89712
5
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