S_G Block

Replacing FMEA with Datapath Analysis for IP Designs (WP545)
Document ID
WP545
Release Date
2023-06-14
Revision
1.0 English
The following table lists the external connections and internal signaling for the S_G block.
Table 1. S_G BLOCK
BLOCK 4 Scatter-Gather ID TAG Fault Modes Fault Initiators Proposed Diagnostics Repeat Claimed DC Coverage
External Connections Signal/Bus Name
1 m_axi_sg_ TOP_axi_sg Bus Write to incorrect address Address Write register corruption Parity   99.50%
Control plane state machine corruption Redundancy   99.80%
Clocking corruption    
Driver/receiver failure    
Bus write with incorrect data Write Data register corruption Parity   99.50%
Control plane state machine corruption Redundancy   99.80%
Clocking corruption    
Driver/receiver failure Loopback   90.00%
Bus Read from incorrect address Read Address register corruption Parity   99.50%
Control plane state machine corruption Redundancy   99.80%
Clocking corruption    
Receiver failure    
Bus read incorrect data Read Data register corruption Parity   99.50%
Control plane state machine corruption Redundancy   99.80%
Clocking corruption    
Receiver failure Parity   99.50%
1 (cont'd)     Bus hang Control plane state machine corruption Redundancy   99.80%
  External watchdog   90.00%
3 m_axi_sg_aclk TOP_axi_sg_clk No clock Logic connection failure External watchdog   90.00%
Incorrect clock frequency Clock divider failure External watchdog   90.00%
4 CLK TOP_CLK No clock Logic connection failure External watchdog Y  
Incorrect clock frequency Clock divider failure External watchdog  
5 axi_resetn TOP_axi_resetn Unintended reset assertion Logic connection failure Supervision Y  
Reset signal timing too short Clock divider failure Supervision  
Internal Signal Block Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
1 b2_b4_signaling b1_b2_signal Incorrect data Data register corruption Data parity   99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
2 b3_b4_signaling b2_b3_signal Incorrect data Data register corruption Data parity Y  
Incorrect clocking Clock divider failure External watchdog  
3 b4_b5_signaling b2_b4_signal Incorrect data Data register corruption Data parity   99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
Block Function Description ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
Function block manages scatter-gather operation of the DMA by reading the descriptor from main memory, decoding the descriptor and updating the address and range of the DMA controller for each channel. S_G_BLOCK See breakout        
Sub Block MM2S_Controller Block_4A
External Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat Claimed DC Coverage
1 b2_b4_signaling b1_b2_signal Incorrect data Data register corruption Data parity Y  
Incorrect clocking Clock divider failure External watchdog  
Internal Signal Block Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
1 b4A_b4B_signaling b4A_b4B_signal Incorrect data Data register corruption Data parity   99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
2 b4A_b4C_signaling b4A_b4C_signal Incorrect data Data register corruption Data parity   99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
3 b4A_b4E_signaling b4A_b4E_signal Incorrect data Data register corruption Data parity   99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
Block Function Description ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
Functional block stores the address and range information from the descriptor for the MM2S Channel. Controls stepping for the next descriptor. Block_4A Corrupted data storage Single event upset Parity 99.50%
Decode wrong state State machine corruption Redundancy   99.50%
Sub Block S2MM_Controller Block_4F
External Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
1 b4_b5_signaling b4_b5_signal Incorrect data Data register corruption Data parity Y  
Incorrect clocking Clock divider failure External watchdog  
Internal Signal Block Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
1 b4B_b4F_signaling b4B_b4F_signal Incorrect data Data register corruption Data parity   99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
2 b4D_b4F_signaling b4D_b4F_signal Incorrect data Data register corruption Data parity   99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
3 b4E_b4F_signaling b4E_b4F_signal Incorrect data Data register corruption Data parity   99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
Block Function Description ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
Functional block stores the address and range information from the descriptor for the S2MM Channel. Controls stepping for the next descriptor Block_4F Corrupted data storage Single event upset Parity 99.50%
Decode wrong state State machine corruption Redundancy   99.50%
Sub Block Register_Interface Block_4B
External Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
1 b4_b5_signaling b3_b4_signal Incorrect data   Data parity Y  
Incorrect clocking External watchdog  
Internal Signal Block Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
1 b4A_b4B_signaling b4A_b4B_signal Incorrect data Data register corruption Data parity   99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
2 b4B_b4F_signaling b4B_b4F_signal Incorrect data Data register corruption Data parity   99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
Block Function Description ID TAG Fault modes Diagnostics Repeat EST DC Coverage
Stores key register values for the command control of MM2S and S2MM controller blocks Block_4B Corrupted data storage Single event upset Parity 99.50%
Sub Block MM2S Descriptor Storage Block_4C
External connections Signal/Bus Name ID TAG Fault modes Diagnostics Repeat EST DC Coverage
None
Internal Signal block Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
1 b4A_b4C_signaling b4A_b4C_signal Incorrect data Data register corruption Data parity Y  
Incorrect clocking Clock divider failure External watchdog  
2 b4C_b4E_signaling b4C_b4E_signal Incorrect data Data register corruption Data parity   99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
Block Function Description ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
Stores descriptor for MM2S channel Block_4C Corrupted data storage Single event upset Parity 99.50%
Sub Block S2MM Descriptor Storage Block_4D
External Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
None
Internal Signal Block Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
1 b4D_b4E_signaling b4D_b4E_signal Incorrect data Data register corruption Data parity 99.50%
Incorrect clocking Clock divider failure External watchdog   90.00%
2 b4D_b4F_signaling b4D_b4F_signal Incorrect data Data register corruption Data parity Y  
Incorrect clocking Clock divider failure External watchdog  
Block Function Description ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
Stores descriptor for S2MM channel Block_4D Corrupted data storage   Parity 99.50%
Sub Block AXI_Master Block_4E
External Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
1 m_axi_sg_ TOP_axi_sg Bus Write to incorrect address Address Write register corruption Parity Y
Control plane state machine corruption Redundancy
Clocking corruption  
Driver/receiver failure  
Bus write with incorrect data Write Data register corruption Parity
Control plane state machine corruption Redundancy
Clocking corruption  
Driver/receiver failure Loopback
Bus Read from incorrect address Read Address register corruption Parity
Control plane state machine corruption Redundancy
Clocking corruption  
Receiver failure  
1 (cont'd)     Bus read incorrect data Read Data register corruption Parity Y
Control plane state machine corruption Redundancy
Clocking corruption  
Receiver failure Parity
Bus hang Control plane state machine corruption Redundancy
    External watchdog
2 m_axi_sg_aclk TOP_axi_sg_clk No clock   None Y  
Incorrect clock frequency None  
Internal Signal block Connections Signal/Bus Name ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
1 b4A_b4E_signaling b4A_b4E_signal Incorrect data Driver/receiver failure Data parity Y  
Incorrect clocking Connection logic failure External watchdog  
2 b4C_b4E_signaling b4C_b4E_signal Incorrect data Driver/receiver failure Data parity Y  
Incorrect clocking Connection logic failure External watchdog  
3 b4D_b4E_signaling b4D_b4E_signal Incorrect data Driver/receiver failure Data parity Y  
Incorrect clocking Connection logic failure External watchdog  
4 b4D_b4F_signaling b4D_b4F_signal Incorrect data Driver/receiver failure Data parity Y  
Incorrect clocking Connection logic failure External watchdog  
Block Function Description ID TAG Fault Modes Diagnostics Repeat EST DC Coverage
Drives AXI bus master protocol based on requests from MM2S controller block or S2MM controller block using round robin. Sends descriptor record to MM2S or S2MM storage. Block_4E Incorrect state State machine corruption Redundancy   99.50%