AD ADSP-21MOD870-110 Internet gateway processor software Datasheet

a
Internet Gateway Processor Software
ADSP-21mod870-110
FEATURES
ISDN B-Channel HDLC
DATA Modulations
CCITT V.90 (30k–56k)
K56Flex™ (30k–56k)
ITU-T V.34: 33600 Bits/s–2400 Bits/s
CCITT V.32bis: 14400 Bits/s–7200 Bits/s
CCITT V.32: 9600 Bits/s, 4800 Bits/s
CCITT V.23
CCITT V.22/V.22bis: 2400, 1200, 600 Bits/s
CCITT V.21: 300 Bits/s
Bell 212A: 1200 Bits/s
Bell 103: 300 Bits/s
Start-Up Procedures:
ITU-T V.8
Error Correction and Data Compression:
CCITT V.42 Error Correction (LAPM and MNP2-4)
CCITT V.42bis Data and MNP Class 5 Compression
FAX Modem
V.17/V.29/V.27ter/V.21 Channel 2
T.30 Protocol
V.120
V.110
PPP Asynchronous Framing Support (RFC 1662)
Low Power
80 mW Typical Active
Low Power and Sleep Modes
High Density
100-Lead LQFP Package
On-Chip DS0/DS1 Interface
Full Function DMA Port
No External Memory Required
0.4 Square Inch per Complete Modem Port
3.3 V Supply
Fully Upgradable RAM-Based Architecture
Fast Download
Full Image in 5 ms
High Speed 16-Bit Port Link Bus Provides Simple
Interface Between Host and Modem Pool
INTRODUCTION
The ADSP-21mod870-110 is a complete single chip. All datapump and controller functions are implemented on a single
0.4 square-inch chip. This modem package allows the highest
modem port density, while achieving the lowest power consumption in a software upgradable platform.
The ADSP-21mod870-110 is designed for high density systems
such as remote access servers (see Figure 1). Its high performance DSP core, large on-chip SRAM, TDM serials port and
16-bit DMA port provide efficient control and data communication with minimal chip count. The modem software provides
a number of data modulations, such as V.34, 56K bps PCM,
and ISDN with a software upgrade path to future standards,
and new applications, such as voice over network. The host
interface allows system access to modem statistics such as call
progress, connect speed and modulation parameters such as
retrain count and symbol rate.
ON-CHIP SRAM
The ADSP-21mod870-110 processor integrates 160K bytes of
on-chip memory. The modem datapump and controller software, as well as data storage, are contained in the on-chip SRAM.
The SRAM cells are designed by Analog Devices. These cells
are optimized for high speed digital signal processing and low
power consumption. You can dynamically configure the ADSP21mod870 with software through the 16-bit DMA interface.
DMA INTERFACE
The 16-bit internal DMA port (IDMA port) provides transparent, direct access to the on-chip RAM of the ADSP-21mod870
processor. This high speed access to on-chip memory simplifies
control and data communication and system debug. Use the
16-bit DMA interface to dynamically configure the ADSP21mod870 with software.
K56Flex is a trademark of Rockwell International and Lucent Technologies.
REV. 0
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999
ADSP-21mod870-110
IDMA
ADSP21mod870
SP0
T1, E1,
PRI, xDSL,
ATM
IDMA
ADSP21mod870
SP0
LINE
INTERFACE
IDMA
ADSP21mod870
SP0
IDMA
ADSP21mod870
SP0
HOST
PORT LINK
BUS
(ADSP-2183)
CALL
CONTROL
IDMA
ADSP21mod870
SP0
IDMA
ADSP21mod870
SP0
IDMA
ADSP21mod870
SP0
IDMA
ADSP21mod870
SP0
LAN OR
INTERNET
ADSP-21mod870 FUNCTIONS
HOST FUNCTIONS
V.34/56k MODEM
DTMF DIALING
V.17 FAX
CALLER ID
MULTI-DSP CONTROL, OVERLAY
MANAGEMENT AND DATA TRANSFERS
V.42, V.42bis, MNP2-5
HDLC PROTOCOL
Figure 1. ADSP-21mod870 Network Access System
SERIAL PORTS
Parallel Telco PCM Data Stream Architecture
The ADSP-21mod870 processor incorporates two complete
synchronous, double-buffered serial ports for serial communications. The serial ports interface directly to a time-division
multiplexed (TDM) 1544 kbps (T1) or 2048 kbps (E1) serial
stream, to an 8K sample/s data stream, or to an 8-bit companded
(64 kb/s) data stream (DS0). The serial ports operate under
modem software control.
The parallel Telco PCM data stream architecture, shown in
Figure 3, provides a single bus interface for all data and control.
In this architecture, the modem pool may have a remote Telco
interface that provides a parallel data stream of Telco PCM data
to the DSP through the DSP’s DMA Port. An arbitrary number
of DSPs can be connected, through the DMA Port, to a Host
that provides the parallel data stream.
SUPPORTED SYSTEM ARCHITECTURES
Note: The number of parallel DSPs is limited only by the software loading constraints on the Host.
The ADSP-21mod870-110 Internet Gateway Processor Software supports two system architectures: serial Telco PCM TDM
data stream and parallel Telco PCM data stream. The two architectures are differentiated by the method of proving Telco
PCM data to the DSP Modem.
MEMORY I/F
DMA PORT
ADSP21mod870
Serial Telco PCM TDM Data Stream Architecture
ADSP21mod870
The serial Telco PCM TDM data stream architecture, shown
in Figure 2, is the most common architecture. In this architecture, the modem pool may have a local Telco interface that
provides a serial TDM data stream of Telco PCM data to the
DSP through the DSP’s Serial Port. You can connect up to
24/32 DSPs, through the Serial Port, to a 24/32 channel serial
TDM data stream.
MEMORY I/F
DMA PORT
HOST
ADSP21mod870
ADSP21mod870
TELCO PCM
I/F
SERIAL PORT
ADSP21mod870
Figure 3. Parallel Telco PCM Data Stream Architecture
ADSP21mod870
HOST
TELCO PCM
I/F
ADSP21mod870
ADSP21mod870
Figure 2. Serial Telco PCM TDM Data Stream Architecture
–2–
REV. 0
ADSP-21mod870-110
SOFTWARE INTERFACE
Modem Statistics
Analog Devices provides sample C code for the software interface to the ADSP-21mod870-110. The software interface encompasses the following four areas—download, control interface,
data interface and modem statistics.
Several modem statistics can be gathered through the IDMA
port. These statistics include call status, modulation in use,
connect rate, transmit and receive data rate, symbol rate, retrain
count, rate renegotiation count and others. Table II and Table
IV contain a complete listing of available modem statistics.
Download
Modem Configuration
The IDMA port on the ADSP-21mod870-110 contains an
autoincrementing address generator. The host writes the starting address of the transfer and then writes the first word of
data. After the first write, the IDMA address generator automatically increments; the host writes the next data word and
the IDMA transfers that word to the next location in ADSP21mod870-110 memory.
The modem is configured by programming various parameters
through the IDMA port. Table III and Table V contain complete lists of modem configuration parameters.
Table II. Shell Status
The executable image contains code and data that must be
loaded into program and data memory. Program memory on
the ADSP-21mod870-110 is 24 bits wide, therefore two transfers are used to load each word of program memory.
The host begins the download by asserting the RESET pin of
the ADSP-21mod870-110. The host then transfers all code and
data. All internal memory can be loaded in 5 ms.
The ADSP-21mod870-110 is controlled through two FIFOs in
DSP memory. The host sends a control event by writing to the
host-to-modem FIFO. The ADSP-21mod870-110 posts events
to the host by writing into the modem-to-host FIFO.
Data Interface
All data transferred to and from the ADSP-21mod870-110
passes through word FIFOs located in internal memory on the
ADSP-21mod870. The FIFOs are accessed through a control
structure that contains a pointer to the start of the FIFO in
memory, the length of the FIFO in 16-bit words, a pointer to
the next address to be read, and a pointer to the next address to
be written. The transmit and receive FIFOs are 1024 bytes
deep. Example code providing primitives for accessing the
byte-FIFOs is available from Analog Devices. Table I shows an
example of a data FIFO.
Table I. FIFO Example
BASE
INFO
INFO
INFO
INFO
WR_ptr
BASE + SIZE
REV. 0
Function
SS. 0
SS. 1
SS. 2
SS. 3
Product Number
Application Version
Application Type
Programmable Flag Data
Table III. Shell Parameters
Control Interface
RD_ptr
Reference #
–3–
Reference #
Function
SP. 0
SP. 1
SP. 2
SP. 3
SP. 4
SP. 5
Serial Port Tx Time Slot
Serial Port Rx Time Slot
Serial Port Configuration
Programmable Flag Control
Programmable Flag Data
Host Interrupt Count
ADSP-21mod870-110
Table V. Modem Parameters
Table IV. Modem Status
Reference # Function
Reference # Function
MS. 0
MS. 1
MS. 2
MS. 3
MS. 4
MS. 5
MS. 6
MS. 7
MS. 8
MS. 9
MS. 10
MS. 11
MS. 12
MS. 13
MS. 14
MS. 15
MS. 16
MS. 17
MS. 18
MS. 19
MP. 0
MP. 1
MP. 2
MS. 20
MS. 21
MS. 22
MS. 23
MS. 24
MS. 25
MS. 26
MS. 27
MS. 28
MS. 29
MS. 30
MS. 31
MS. 32
MS. 33
MS. 34
MS. 35
MS. 36
MS. 37
MS. 38
MS. 39
MS. 40
MS. 41
MS. 42
MS. 43
MS. 44
MS. 45
MS. 46
MS. 47
MS. 48
Data Modulation State
SNR MSE Measure
Rx Level dBm
Tx Level dBm
Tx V.34 Symbol Rate
Rx V.34 Symbol Rate
Round Trip Delay
Telemetry Data Update
Constellation X
Constellation Y
Variable 2 X Pointer
Variable 2 Y Pointer
Variable 3 X Pointer
Variable 3 Y Pointer
Variable 4 X Pointer
Variable 4 Y Pointer
Data Modulation Monitor Retrain Local Count
Data Modulation Monitor Retrain Remote Count
Data Modulation Monitor Retrain Auto Count
Data Modulation Monitor Renegotiate Local
Count
Data Modulation Monitor Renegotiate Remote
Count
Data Modulation Monitor Renegotiate Auto
Count
Omc Carrier Family
Omc Disconnect Reason
Omc State
Omc Time
Omc Idle Time Start
Omc Data Protocol Time Start
Omc Initial Rx Data Rate
Omc Current Rx Data Rate
Omc Initial Tx Data Rate
Omc Current Tx Data Rate
Data Protocol
Data Protocol Compression
Data Protocol Rx HDLC Error Frame Count
Data Protocol Rx HDLC Frame Count
Data Protocol Tx HDLC Frame Count
Data Protocol Tx Data Frame Count
Data Protocol Tx Data Frame Retransmit Count
Data Protocol Rx Data Frame Count
Data Protocol Rx Data Frame Missing Count
Data Modulation Monitor Retrain Remote
Count
Data Protocol Call Tx Data Compressibility
Metric
Data Protocol Call Rx Data Compressibility
Metric
Data Protocol Call Tx Data Metric
Data Protocol Call Rx Data Metric
V.PCM Digital Attenuation
V.PCM Robbed Bit Mask
V.PCM Coding Law
MP. 3
MP. 4
MP. 5
MP. 6
MP. 7
MP. 8
MP. 9
MP. 10
MP. 11
MP. 12
MP. 13
MP. 14
MP. 15
MP. 16
MP. 17
MP. 18
MP. 19
MP. 20
MP. 21
MP. 22
MP. 23
MP. 24
MP. 25
MP. 26
MP. 27
MP. 28
MP. 29
MP. 30
MP. 31
MP. 32
MP. 33
MP. 34
MP. 35
MP. 36
MP. 37
MP. 38
MP. 39
–4–
Omc Data Modulation Originate Enable
Dial Billing Delay Duration
Omc Data Modulation/Data Protocol
Maximum Start-Up Duration
Data Protocol Start Delay
Data Protocol Allowed Mask
Data Protocol Preferred Mask
Data Protocol Auto-Select Mask
Data Protocol Compression Mask
Data Protocol Cmn Binary Enable
Data Protocol Cmn HDLC Enable
Data Protocol LAPM to Sync
Data Protocol MNP Block Mode Enable
Data Protocol MNP Data Compression Select
Data Protocol MNP Header Optimize Enable
Data Protocol MNP Maximum Data Size
Data Protocol MNP Service Class
Data Protocol Disconnect Management Mode
Data Protocol Disconnect Management
Duration
Digital Data Modes
Pump Data Modes
Pump Tone Transmit Level
Pump Transmit Level
Pump V.34 Transmit Level
Data Modulation Carrier Detect Duration
Data Modulation Carrier Loss Disconnect
Timer Duration
Data Modulation Line Quality Monitor Mode
Data Modulation Options Mask
Data Modulation V.32 Rate Enable Mask
Data Modulation V.34 Data Rate Mask
V.PCM Maximum Power
V.PCM Reference Point
K56 RBS Maximum
K56 Tx Data Rate Maximum
K56 Tx Data Rate Minimum
DTE Interface Big Endian
PPP Rx Mode Enable
PPP Tx Mode Enable
fP PPP Detect Enable
fP PPP Rx ACCM
fP PPP Tx ACCM
REV. 0
ADSP-21mod870-110
ORDERING GUIDE
Part Number
Description
Instruction Rate MHz
Package Description
Package Option
ADSP-21mod870-110
52 MIPS DSP with Modem
Software Unit License
52.0
100-Lead LQFP
ST-100
REV. 0
–5–
ADSP-21mod870-110
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
100-Lead Metric Thin Plastic Quad Flatpack (LQFP)
(ST-100)
0.555 (14.10)
0.551 (14.00) TYP SQ
0.547 (13.90)
0.063 (1.60) MAX
0.030 (0.75)
0.024 (0.60) TYP
0.020 (0.50)
12°
TYP
C3469–2–2/99
0.640 (16.25)
0.630 (16.00) TYP SQ
0.620 (15.75)
100
1
76
75
SEATING
PLANE
TOP VIEW
(PINS DOWN)
0.004
(0.102)
MAX LEAD
COPLANARITY
25
68 ± 48
51
50
26
08 – 78
0.007 (0.177)
0.005 (0.127) TYP
0.003 (0.077)
0.020 (0.50)
BSC
LEAD PITCH
0.011 (0.27)
0.009 (0.22) TYP
0.007 (0.17)
PRINTED IN U.S.A.
LEAD WIDTH
NOTE:
THE ACTUAL POSITION OF EACH LEAD IS WITHIN 0.0032 (0.08) FROM
ITS IDEAL POSITION WHEN MEASURED IN THE LATERAL DIRECTION.
CENTER FIGURES ARE TYPICAL UNLESS OTHERWISE NOTED.
–6–
REV. 0
Similar pages