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Important information
This document applies exclusively to the configuration of the NG-LARGE FPGA referenced NX1H140TSP.
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Maximum user logic configuration (100%) | 24.43Mb |
Medium configuration (70%) | 17.10Mb |
Small configuration (50%) | 12.22Mb |
D-Flip-Flop initialization (1) (129024) | 1b/D-Flip-Flop |
Core RAM initialization (2) (192 instances) | 96.06Kb/RAM block |
Core Register File initialization (2) (672 instances) | 3.03Kb/Register File |
CMIC | 64.15Kb |
Total | 44.53Mb |
In a typical design the user can give – or not - an initial value to Flip-Flops at power-up. Reducing the number of initialized Flip-Flops contributes to reduce the bitstream size.
Core RAM and/or Core Register file can also be initialized – or not - at power-up. Reducing the number of initialized memories contributes to reduce the bitstream size.
Most applications do not require to initialize all memories.
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c. Repair flipped bit
d. Write DATA[BAD @]
In case of error that cannot be corrected, for instance double error, the data is blacklisted in order to not generate definitive TRIGGER/ERROR high level.
For further information, please refer to the NX1H140TSP CMIC Application note.
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Table: NG-LARGE NX1H140TSP configuration modes
Multiple devices addressing
Thanks to Device ID feature in the Bitstream Manager, it is possible to connect multiple devices on the same bus and load a bitstream only to the desired device.
In broadcast mode (0xFF), all connected devices will load the bitstream in the configuration memory.
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Bitstream Device ID is set during bitstream generation. It is 8 bits large.
Chip Device ID is set by external pins. It is only 4 bits large.
Configuration modes usage
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Please refer to NxBase2 User Manual documentation in ANGIE chapter.
NG_LARGE
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registers
To access a register, the user needs to use the ADDR_DEBUG instruction first, and then the WR_DEBUG or RD_DEBUG instructions.
NG-LARGE is divided in 9 rows with the following set of registers for each row. When addressing a register, address is 32 bits long with the following mapping:
Address | Mapping |
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[31:16] | Address of the row. 0xff indicates a broadcast mode addressing all rows in the same time. |
[15:0] | Address of register for the corresponding row. |
When generating a bitstream, default values are sent for all registers but it is possible to change these values inside the bitstream. Refer to initRegister NXmap method.
Note all NG-MEDIUM registers are kept in NG-LARGE and get the same addresses.
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