
Page 392 of 906
NT6D80 MSDL card
553-3001-211 Standard 3.00 August 2005
Functional description
Figure 83 on
page 393
illustrates the MSDL functional block diagram. The
MSDL card is divided into four major functional blocks:
•
CPU bus interface
•
Micro Processing Unit (MPU)
•
Memory
•
Serial interface
Two processing units serve as the foundation for the MSDL operation: the
Central Processing Unit (CPU) and the MSDL Micro Processing Unit
(MPU). CS 1000 Release 4.5 software, MSDL firmware, and peripheral
software control MSDL parameters. Peripheral software downloaded to the
MSDL controls MSDL operations.
The MSDL card’s firmware and software do the following:
•
communicate with the CPU to report operation status
•
receive downloaded peripheral software and configuration parameters
•
coordinate data flow in conjunction with the CPU
•
manage data link layer and network layer signaling that controls
operations connection and disconnection
•
control operation initialization and addressing
•
send control messages to the operations
CPU bus interface
The CPU bus transmits packetized information between the CPU and the
MSDL MPU. This interface has a 16-bit data bus, an 18-bit address bus, and
interrupt and read/write control lines.
Shared Random Access Memory (RAM) between the CPU and the MSDL
MPU provides an exchange medium. Both the CPU and the MSDL MPU can
access this memory.
Содержание Circuit Card
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Страница 4: ...Page 4 of 906 Revision history 553 3001 211 Standard 3 00 August 2005...
Страница 18: ...Page 18 of 906 Contents 553 3001 211 Standard 3 00 August 2005...
Страница 78: ...Page 78 of 906 Overview 553 3001 211 Standard 3 00 August 2005...
Страница 100: ...Page 100 of 906 Acceptance tests 553 3001 211 Standard 3 00 August 2005...
Страница 156: ...Page 156 of 906 Option settings 553 3001 211 Standard 3 00 August 2005...
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Страница 544: ...Page 544 of 906 NT8D02 and NTDK16 Digital Line cards 553 3001 211 Standard 3 00 August 2005...
Страница 546: ...Page 546 of 906 NT8D03 Analog Line card 553 3001 211 Standard 3 00 August 2005...
Страница 564: ...Page 564 of 906 NT8D09 Analog Message Waiting Line card 553 3001 211 Standard 3 00 August 2005...
Страница 626: ...Page 626 of 906 NT8D14 Universal Trunk card 553 3001 211 Standard 3 00 August 2005...
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Страница 762: ...Page 762 of 906 NTAK79 2 0 Mb PRI card 553 3001 211 Standard 3 00 August 2005...
Страница 768: ...Page 768 of 906 NTAK93 D channel Handler Interface daughterboard 553 3001 211 Standard 3 00 August 2005...
Страница 772: ...Page 772 of 906 NTBK22 MISP card 553 3001 211 Standard 3 00 August 2005...
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Страница 906: ...Page 906 of 906 Appendix A LAPB Data Link Control protocol 553 3001 211 Standard 3 00 August 2005...
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