MSC2121A Datasheet, PDF (1/77 Pages) OKI electronic componets – 14.4 kbps Full Duplex Modem Chip Set With Built-in Protocols

OKI Semiconductor
MSC2121A
14.4 kbps Full Duplex Modem Chip Set With Built-in Protocols
FEDL2121A-03
Issue Date: Jul. 16, 2002
GENERAL DESCRIPTION
The MSC2121A is a modem chip-set that provides full duplex data transmission capability of up
to 14400 bits/s conforming to ITU-T Recommendation (V.32 bis, V.22 bis, V.22, and V.21) and Bell
Standard (212A and 103J), and also provides facsimile transmission capability conforming to
ITU-T Recommendation (V.17, V.33, V.29, and V.27 ter). The MSC2121A supports the function
as a facsimile activated by FAX Class 1 Command in EIA Standard, as well as the function to set
a modem and to control calls originating and terminating with AT Commands and the function
as a data modem including error correction and data compression. So, the use of this chip-set
enables easy implementation of terminals that have those functions, which are being widely
employed in personal computer communication, as a full-duplex modem of 14400 bits/s and as
a facsimile reciever and transmitter. In the MSC2121A, no external program memory will be
required because the control program codes are stored in the program memories that a general-
purpose MCV has. General-purpose SRAMs (which are essential) and EEPROMs (which are
removable) should be used for external memories.
This chip-set comprises the following two LSIs:
MSM66507 General-purpose MCU
MSM7564-01 Single-chip modem
The above ICs are available in a FLAT or PLCC package. For details, please refer to the individual
semiconductor specifications of each IC.
FEATURES
• Communication Modes
ITU-T Recommendation
ITU-T Recommendation
ITU-T Recommendation
ITU-T Recommendation
BELL Standard
BELL Standard
ITU-T Recommendation
ITU-T Recommendation
ITU-T Recommendation
ITU-T Recommendation
V.32bis 14,400/12,000/9,600/
7,200/4,800 bps
V.22bis 2,400 bps
V.22
1,200 bps
V.21
300 bps
212A 1,200 bps
103J
300 bps
V.17
14,400/12,000/9,600
/7,200 bps
V.29
9,600/7,200 bps
V.27ter 4,800/2,400 bps
V.21ch.2 300 bps
Full duplex, SYNC/ASYNC
Full duplex, SYNC/ASYNC
Full duplex, SYNC/ASYNC
Full duplex, ASYNC
Full duplex, SYNC/ASYNC
Full duplex, ASYNC
Half duplex, SYNC
Half duplex, SYNC
Half duplex, SYNC
Half duplex, SYNC
• Command Set
Hayes AT commands.
EIA/TIA-578 (Class 1) fax commands
• Dial Function
DTMF send function (tone dialing)
DP send function (pulse dialing): 20 pps, 10 pps (Make/break ratio: 33%, 39%)
Note:
The following notice shall be printed somewhere in your application such as on its
container box;
“This Product is licensed under U.S. Patent 4,558,302 and foreign counterparts.”
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