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| 1 | +Micro-Architecture Specification (MAS) for Arbiter Module |
| 2 | +# 1. Overview |
| 3 | +Brief Description: |
| 4 | +This document details the micro-architecture of an Arbiter module designed to manage multiple client requests and select a winner based on a predefined arbitration scheme. |
| 5 | + |
| 6 | +Purpose and Functionality: |
| 7 | +The Arbiter module is used to arbitrate among NUM_CLIENTS clients. It determines which client gains access based on the input signals. |
| 8 | + |
| 9 | +# 2. Block Diagram |
| 10 | +[Placeholder for Block Diagram] |
| 11 | +Insert High-Level Block Diagram of the Arbiter here |
| 12 | + |
| 13 | +# 3. Interfaces |
| 14 | +Signal Descriptions: |
| 15 | + |
| 16 | +| Signal Name | Direction | Description | |
| 17 | +|------------------|-----------|---------------------------------------------| |
| 18 | +| clk | Input | Clock signal. | |
| 19 | +| rst | Input | Reset signal. | |
| 20 | +| valid_candidate | Input | Array indicating valid candidates. | |
| 21 | +| winner_dec_id | Output | Decision array indicating the winner. | |
| 22 | + |
| 23 | +# 4. Functional Description |
| 24 | +Operational Modes: |
| 25 | + |
| 26 | +The module arbitrates among NUM_CLIENTS clients. |
| 27 | +It uses the valid_candidate array to determine which clients are currently requesting access. |
| 28 | +Data Flow Description: |
| 29 | + |
| 30 | +The arbiter prioritizes clients based on a fixed scheme. |
| 31 | +Upon determining a winner, the winner_dec_id signal is asserted corresponding to the winning client. |
| 32 | +# 5. Configuration and Control |
| 33 | +Configuration Registers: |
| 34 | + |
| 35 | +NUM_CLIENTS: Defines the number of clients participating in arbitration. |
| 36 | +# 6. Performance and Characteristics |
| 37 | +Throughput: |
| 38 | +Dependent on the clock frequency. |
| 39 | + |
| 40 | +Latency: |
| 41 | +Typically one clock cycle for arbitration decision. |
| 42 | + |
| 43 | +# 7. Error Handling and Exceptions |
| 44 | +The module does not explicitly include error handling mechanisms in the provided RTL. Design-specific error handling should be considered. |
| 45 | +# 8. Testing and Verification |
| 46 | +Test Plan Overview: |
| 47 | + |
| 48 | +Verify correct arbitration among multiple clients. |
| 49 | +Test for edge cases where multiple clients request access simultaneously. |
| 50 | +Verification Strategies: |
| 51 | + |
| 52 | +Simulate with varying numbers of clients. |
| 53 | +Stress test with simultaneous requests. |
| 54 | + |
| 55 | +# 9. Change Log |
| 56 | +Revision History: |
| 57 | + |
| 58 | +Initial version: [Date] |
| 59 | +Author Information: |
| 60 | + |
| 61 | +[Author Name] |
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