Am186™CC/CH/CU Microcontrollers User’s Manual
17-1
CHAPTER
17
GENERAL CIRCUIT INTERFACE (GCI)
Note: Only the Am186CC microcontroller supports GCI.
17.1
OVERVIEW
The General Circuit Interface (GCI) is an interface specification developed jointly by Alcatel,
Italtel, GPT and Siemens. This specification (sometimes called IOM-2) defines an industry-
standard serial bus for interconnecting telecommunications integrated circuits. The
standard covers linecard, NT1, and terminal architectures for Integrated Services Digital
Network (ISDN) applications. The Am186CC microcontroller supports the terminal version
of GCI, which serves four main functions:
■
Connection of voice/data modules to an OSI Layer 1, GCI-SCIT (Special Circuit
Interface T) device (transceiver)
■
Programming and control of devices that do not have a microprocessor interface (e.g.,
a coder-decoder (codec) or a U-Interface transceiver)
■
Interchip communications between devices on the bus (e.g., a codec to a speech
encryption device)
■
Connection of multiple data link controllers to the D channel, including access arbitration
handled through the Terminal Interchip Communication (TIC) bus
Depending on the application, each HDLC can communicate to the external world with or
without a TSA. Each of the four HDLC channels can be programmed to select between raw
DCE and dedicated PCM Highway external interfaces.
The Am186CC microcontroller’s HDLC Channel A interfaces to the GCI controller block,
and allows multiplexed PCM Highway and GCI interfaces to the other three HDLC channels.
See Chapter 15, “High-Level Data Link Control (HDLC)” and Chapter 16, “HDLC External
Serial Interface Configuration (TSAs)” for more information. Full documentation on
GCI/IOM-2 is available in the AMD
IOM-2 Interface Reference Guide, order #12576.
17.2
BLOCK DIAGRAM
Figure 17-1 shows the block diagram for a single HDLC channel, including connections
with the TSA and GCI.
CC
Содержание Am186 CC
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Страница 24: ...Introduction xxiv Am186 CC CH CU Microcontrollers User s Manual...
Страница 39: ...Architectural Overview Am186 CC CH CU Microcontrollers User s Manual 1 15 Figure 1 6 32 Channel Linecard CH CC...
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Страница 86: ...System Overview 3 36 Am186 CC CH CU Microcontrollers User s Manual...
Страница 92: ...Emulator Support 4 6 Am186 CC CH CU Microcontrollers User s Manual...
Страница 112: ...DRAM Controller 6 8 Am186 CC CH CU Microcontrollers User s Manual...
Страница 134: ...Interrupts 7 22 Am186 CC CH CU Microcontrollers User s Manual...
Страница 186: ...Programmable I O Signals 9 8 Am186 CC CH CU Microcontrollers User s Manual...
Страница 200: ...Watchdog Timer 11 6 Am186 CC CH CU Microcontrollers User s Manual...
Страница 232: ...Asynchronous Serial Ports UARTs 13 24 Am186 CC CH CU Microcontrollers User s Manual...
Страница 242: ...Synchronous Serial Port SSI 14 10 Am186 CC CH CU Microcontrollers User s Manual...
Страница 264: ...High Level Data Link Control HDLC 15 22 Am186 CC CH CU Microcontrollers User s Manual...
Страница 332: ...Universal Serial Bus USB 18 34 Am186 CC CH CU Microcontrollers User s Manual...
Страница 348: ...Register Summary A 16 Am186 CC CH CU Microcontrollers User s Manual...
Страница 376: ...Index Index 18 Am186 CC CH CU Microcontrollers User s Manual...