View 73D2348A_936429.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

73D2248A/2348A MNP5, V.42bis Datacom Modem Device Set
April 2000
DESCRIPTION
The 73D2248A/2348A Device Sets consists of two CMOS integrated circuits which provide the data pump and protocol functions required to implement a high performance 2400 bit/s modem with error control and data compression. The 73D2248A basic modem function is provided by the 73K224L modem chip and is compatible with CCITT V.21, V.22, V.22bis and Bell 103 and 212A protocols. The error control functions are provided by modular software running in the 73M2910 controller. Modules are available for MNP4, and V.42. Compression software modules can be added to the controller; MNP5 and V.42bis are available. Provisions for customization of the command set are provided, forming the basis for an international modem. The 73D2348 differs from the 73D2248A in that it uses the 73K324L instead of the 73K224L for the data pump. The 73K324L replaces the Bell 103, 300 bps (bit/s) FSK mode of operation, with the CCITT V.23, 1200 bps (bit/s) FSK mode. The software is also modified to support V.23. The two products are otherwise identical.
FEATURES
* * * * * * * * * Combines modem and protocol controller Supports 0 - 300, 1200 and 2400 bit/s with both sync and async modes Modular software design allows customization Modem protocols: Bell 103 (73K224L), 212A CCITT V.21, V.22, V.22bis, V.23 (73K324L) Error control/compression protocols Available: MNP4, MNP5, CCITT V.42, V.42bis Supports non-volatile memory to store user configurations and phone numbers CMOS design for low power consumption
MNP5, V.42bis Datacom Modem Device Set
73M2910L Controller
8
73K224L/324L Modem
HYBRID/ DAA
TSC 73D2248
16 16
STATIC RAM 32K x 8
ROM 64K x 8
NV RAM 93C66
RECOMMENDED SUPPORT
73D2248A/2348A MNP5, V.42bis Datacom Modem Device Set
FUNCTIONAL DESCRIPTION
The 73D2248A/2348A device set forms the basis for an international modem design incorporating the most advanced error control and compression algorithms. The set consists of two chips, the 73K224L (73K324L) modem and the 73M2910 controller. Customization of the controller is one of the features of this device set; software modules allow the modem vendor to provide a range of features from a standard hardware platform. The 73K224L (73K324L) provides the QAM, PSK and FSK modulator and demodulator functions, call progress and handshake tone monitors, test modes and a tone generator capable of producing DTMF, answer and CCITT guardtones. This single-chip modem supports the V.22bis, V.22, V.21 and Bell 103/CCITT V.23/212A operating protocols in both sync and async modes. Low level functions of the controller provide for automatic detection of DTE speed, auto-dial, auto-answer, handshake with fallback and call progress detection. The 73M2910 controller handles both the low level modem functions as well as protocol negotiation and protocol operation. Software modules can be chosen to provide the desired protocols for product customization and differentiation. In addition, the "AT" command set source code will be available for those desiring to provide unique or country dependent features. Basic capabilities of the modem are those found in the 73K224L (73K324L) single-chip modem and are listed in the separate 73K224L (73K324L) data sheet. AUTOMATIC HANDSHAKE The 73D2248A/2348A will automatically perform a complete handshake with a called or calling modem and enter the data transfer mode. After the link between the two modems has been established, the modems may remain in the normal data mode or negotiate a link which has error control and data compression. Commands are provided to inform the modem which action is appropriate. TEST MODES The 73D2248A/2348A device set has provisions for three test modes: analog loopback, digital loopback and remote digital loopback. Analog loopback allows data to be sent into the local modem, have it modulated and then demodulated and returned to the local terminal. Digital loopback requires the cooperation of the user at the remote end and allows data to be sent to the remote modem, demodulated, then remodulated and returned to the local end. Remote digital loopback allows the same capability, without the need for a remote operator; signals are sent to the remote modem which perform the switching task that a remote operator would have done. AT COMMAND INTERPRETER The 73D2248A/2348A includes an AT Command Interpreter which is a superset of the Hayes 2400 SmartmodemTM command set. Common application software will be able to control the modem though this interpreter. Additional commands have been added to provide for control of the MNP and CCITT V.42 modes. NON-VOLATILE MEMORY A serial NVRAM provides 256 bytes of storage for configuration information and telephone numbers.
2
73D2248A/2348A MNP5, V.42bis Datacom Modem Device Set
PROTOCOLS
Microcom Networking Protocol (MNP) MNP4 is a protocol offering error control while MNP5 offers data compression. Data to be transmitted is broken into blocks of varying sizes, depending on line conditions, and sent to the remote modem along with a 16-bit Cyclic Redundancy Check (CRC) word. If the algorithm used to derive the CRC word at the transmitter does not produce an identical word when exercised on the received data, a line error is assumed, and the block is repeated. Data compression is obtained by transmitting a short set of characters for a longer redundant set. At the receiver, the short string is replaced with the longer string that it represented, and the data stream is returned to its original state. CCITT V.42 AND V.42BIS The CCITT has ratified a set of protocols which operate in a manner similar to MNP. MNP4 corresponds to V.42 while MNP5 corresponds with V.42bis. Greater efficiency is offered, but the tradeoff is a larger memory space requirement. MNP5 requires an 8K buffer, while V.42bis requires 32K. Data files which show compression ratios approaching 2:1 with MNP5 may show ratios of nearly 4:1 with V.42bis. ADDITIONAL INFORMATION The TDK Semiconductor Corporation 73D2248/2348 Design Manual defines the AT commands. Please contact your local TDK Semiconductor Corporation's sales office for a copy of the TDK Semiconductor Corporation's Protocol Design Manual.
3
73D2248A/2348A MNP5, V.42bis Datacom Modem Device Set
AT COMMAND SUMMARY
Command
AT A A/ B0 B1 D DS=n E0 E1 H0 H1 I0 I1 I2 L0 or L1 L2 L3 M0 M1 M2 M3 O0 O1 Q0 Q1 Sr Sr=n Sr? V0 V1 W0 W1 X0 X1 X2 X3
Description
command prefix - precedes command line carriage return character - terminates command line go into answer mode; attempt to go to on-line state re-execute previous command line; not preceded by AT nor followed by select CCITT V.22 and V.21standards for 1200 and 300 bit/s communications select Bell 212A and Bell 103 standards for 1200 and 300 bit/s communicatios dial number that follows; attempt to go to on-line state, originate mode dial stored number in location "n" (0-3) Disable character echo in command state Enable character echo in command state go on hook (hang up) go off hook; operate auxiliary relay request product identification code perform checksum on firmware ROM; return checksum perform checksum on firmware ROM; returns OK or ERROR result codes low speaker volume medium speaker volume high speaker volume speaker off speaker on until carrier detected speaker always on speaker on until carrier detected, except during dialing go to on-line state go to on-line state and initiate equalizer retrain at 2400 bit/s modem returns result codes modem does not return result codes
Command
X4 Y0 Y1 Z0 &C0 &C1 &D0 &D1 &D2 &D3 &F &G0 &G1 &G2 &K &M0 &M1 &M2 &M3 &Q5 &Q6 &T0 &T1 &T3 &T4 &T5 &T6 &T7 &T8
Description
enable features represented by result codes 0-7, 10-12 disable long space disconnect enable long space disconnect reset modem assume data carrier always present track presence of data carrier ignore DTR signal assume command st ate when an on-to-off transition of DTR occurs hang up and assume command state when an on-to-off transition of DTR occurs reset when an on-to-off transition of DTR occurs recall factory settings as active configuration no guard tone 550 Hz guard tone 1800 Hz guard tone flow control method asynchronous mode synchronous mode 1 synchronous mode 2 synchronous mode 3 error control mode automatic speed buffering (ASB) terminate test in progress initiate local analog loopback initiate local digital loopback grant request from remote modem for RDL deny request from remote modem for RDL initiate remote digital loopback initiate remote digital loopback with self test initiate local analog loopback with self test view active configuration, user profiles, and stored numbers save storable parameters of active configuration modem provides transmit clock signal data terminal provides transmit clock signal receive carrier provides transmit clock signal store phone number "x" in location "n" (0-3)
set pointer to register "r" set register "r" to value "n" display value stored in register "r" display result codes in numeric form display result codes in verbose form (as words) negotiation progress result codes not returned negotiation progress result codes returned enable features represented by result codes 0-4 enable features represented by result codes 0-5, 10-12 enable features represented by result codes 0-6, 10-12 enable features represented by result codes 0-5, 7, 10-12
&V &W0 &X0 &X1 &X2 &Zn=x
4
73D2248A/2348A MNP5, V.42bis Datacom Modem Device Set
Dial string arguments: , = delay ; = return to command
@ = silent answer s = dial stored number
! = flash W = wait for tone
R = reverse mode
If the NOVRAM has not been initialized it may be necessary to power down/power up and type AT&F&W to properly initialize modem state. TABLE 1: Result Codes Xn X0 X1 X2 X3 X4 VERBOSE/NUMERIC RESULT CODES OK/0, CONNECT/1, RING/2, NO CARRIER/3, ERROR/4 All functions of X0 + CONNECT (RATE)/1 = 300, 5 = 1200, 10 = 2400 All functions of X1 + NO DIAL TONE/6 All functions of X1 + BUSY/7 All functions of X3 + NO DIAL TONE/6, NO ANSWER/8
TABLE 2: S Registers Supported Sn S0
1
FUNCTION Answer on ring Ring counter Escape code Carriage return Line feed Back space Wait for dial tone Wait for carrier Pause time Carrier valid Carrier drop out DTMF tone duration Escape guard time Unused Bit mapped register Unused
UNITS No. of rings on which to answer No. of rings accumulated ASCII CHR Decimal 0-127 ASCII CHR Decimal 0-127 ASCII CHR Decimal 0-127 ASCII CHR Seconds Seconds Seconds 100 milliseconds (0.1 sec) 100 milliseconds (0.1 sec) 1 millisecond (0.001 sec) 20 milliseconds (0.05 sec) Decimal 0-255
DEFAULT 0002 000 043 013 010 008 002 030 002 006 014 070 050 N/A 170 N/A
S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 *S14 S15
1 2 1
Stored in NVRAM with &W command. Modem will not answer until value is changed to 1 or greater.
5
73D2248A/2348A MNP5, V.42bis Datacom Modem Device Set
TABLE 2: S Registers Supported (continued) Sn S16 S17 S18 S19 S20 *S21 *S22 *S23 S24 S251 S261 *S271 S36 S37 S38 S39 S43 S46 S48 S49 S50 S82 S95
1 1 1
FUNCTION Test register Special test register Test timer Unused Unused Bitmapped register Bitmapped register Bitmapped register Unused DTR delay CTS delay Bitmapped register Negotiation failure treatment Desired modem line speed Hang-up timeout Current flow control setting Current DCE speed Protocol/Compression selection Feature negotiation action ASB Buffer low limit ASB Buffer high limit Break select register Extended result code bit map
UNITS Decimal # Decimal 0-255 Decimal 0-255
DEFAULT 000 096 000 N/A N/A
Decimal 0-255 Decimal 0-255 Decimal 0-255 10 milliseconds (0.01 sec) 10 milliseconds (0.01 sec) Decimal 0-255 Decimal 0-9
000 118 007 N/A 005 001 064 5 000 20 3 0 2 7
1-249 2-250
8 16 128 0
*The bitmapped register functions are equivalent to normal "AT" command modem registers. 1 Stored in NVRAM with &W command
6
73D2248A/2348A MNP5, V.42bis Datacom Modem Device Set
MECHANICAL SPECIFICATIONS
28-Pin PLCC
7
73D2248A/2348A MNP5, V.42bis Datacom Modem Device Set
PACKAGE PIN DESIGNATIONS
(Top View)
USR37 USR36 USR35 84 USR34 83 USR33 USR32 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67
66 65
A0 VPD
100
99
98
97 96
95
94
93
92 91
90
89
88
87 86
WR RD VND
ALE
D7
D6 D5
D4 D3
D2
D1
D0
N/C N/C N/C N/C N/C A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 PSEN RESET VND OSCOUT OSCIN N/C N/C CLK2OUT N/C N/C
85
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
N/C N/C USR50 N/C USR51 USR31 USR30 USR40 USR41 USR42 USR43 USR44 USR45 USR46 USR47 VND VPD USR20 USR21 USR22 USR23 USR24 USR25 USR26 USR27 N/C N/C N/C N/C N/C
64 63 62 61 60 59 58 57 56 55 54 53 52 51 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 USR15 49 USR16 50 USR17
PRXCLK
PTXCLK PTXD
PRXD
VPD
CLK1OUT TXD
INT) VND
USR10
USR11 USR12
73M2910L-IG Controller 100-Lead QFP
8
USR13 USR14
RXD
INT@ INT!
73D2248A/2348A MNP5, V.42bis Datacom Modem Device Set
PACKAGE PIN DESIGNATIONS (continued)
(Top View)
VREF 26 25 24 23 22 21 20 19 12 ALE 13 WR 14 RD 15 VDD 16 TXA 17 INT 18 TXCLK RESET ISET RXCLK RXD TXD CS EXCLK XTL2 XTL1 GND RXA AD0 CLK
CAUTION: Use handling procedures necessary for a static sensitive component.
4 AD1 AD2 AD3 AD4 AD5 AD6 AD7 5 6 7 8 9 10 11
3
2
1
28
27
73K224L-28IH or 73K324L-28IH Single Chip Modem 28-Pin PLCC
ORDERING INFORMATION
PART DESCRIPTION 73D2248 73D2348 Surface Mount Packages 73K224L-IH/73M2910L-IG Surface Mount Packages 73K324L-IH/73M2910L-IG 73D2348 73K324L-28IH/73M2910L-IG 73D2248 73K224L-28IH/73M2910L-IG ORDER NUMBER PACKAGING MARK
No responsibility is assumed by TDK Semiconductor Corporation for use of this product nor for any infringements of patents and trademarks or other rights of third parties resulting from its use. No license is granted under any patents, patent rights or trademarks of TDK Semiconductor Corporation and the company reserves the right to make changes in specifications at any time without notice. Accordingly, the reader is cautioned to verify that you are referencing the most current data sheet before placing orders. To do so, see our web site at http://www.tsc.tdk.com or contact your local TDK Semiconductor representative. Copyright Notice: The software contained within certain components of the 73D2248A/2348A is copyright protected and may only be used in conjunction with the 73D2248A/2348A product as supplied by TDK Semiconductor Corporation. No license to reproduce this software is granted or implied. This material may not be reproduced in any form without the express written permission of TDK Semiconductor Corporation. (c)Copyright 1992. All rights reserved. TDK Semiconductor Corp., 2642 Michelle Dr., Tustin, CA 92780, (714) 508-8800, FAX (714) 508-8877, http://www.tsc.tdk.com Protected by the following patents: (4,777,453) (4,789,995) (4,870,370) (4,847,868) (4,866,739) (c)1992 TDK Semiconductor Corporation
04/24/00- rev. D
9

▲Up To Search▲

Price & Availability of 73D2348A

	To Download 73D2348A Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .