UltraScale Architecture Memory Resources

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Chapter 2: Built-in FIFO Table 2-4: Write Port Width Independent-Clock FIFO Port Width and Depths – FIFO18E2 Read Port Width Latch Mode (REGISTER_MODE = "UNREGISTERED") Write Port Depth Register Mode (REGISTER_MODE = "REGISTERED") Standard FWFT Standard FWFT Read Port Depth Write Port Depth Read Port Depth Write Port Depth Read Port Depth Write Port Depth Read Port Depth 4 4 4095 4095 4096 4096 4096 4096 4097 4097 4 8 4095 2047 (1) 4097 2048 (1) 4097 2048 (1) 4099 2049 (1) 4 16 4095 1023 (1) 4099 1024 (1) 4099 1024 (1) 4103 1025 (1) 4 32 4095 511 (1) 4103 512 (1) 4103 512 (1) 4111 513 (1) 8 4 2047 4094 2047 (2) 4095 2047 (2) 4095 2048 4096 9 9 2047 2047 2048 2048 2048 2048 2049 2049 9 18 2047 1023 (1) 2049 1024 (1) 2049 1024 (1) 2051 1025 (1) 9 36 2047 511 (1) 2051 512 (1) 2051 512 (1) 2055 513 (1) 16 4 1023 4092 1023 (2) 4093 1023 (2) 4093 1023 (2) 4094 18 9 1023 2046 1023 (2) 2047 1023 (2) 2047 1024 2048 18 18 1023 1023 1024 1024 1024 1024 1025 1025 18 36 1023 511 (1) 1025 512 (1) 1025 512 (1) 1027 513 (1) 32 4 511 4088 511 (2) 4089 511 (2) 4089 511 (2) 4090 36 9 511 2044 511 (2) 2045 511 (2) 2045 511 (2) 2046 36 18 511 1022 511 (2) 1023 511 (2) 1023 512 1024 36 36 511 511 512 512 512 512 513 513 Notes: 1. When the read port depth has a fractional part, the read depth value is rounded down. The FIFO does not allow partial words to be read from the FIFO, so a partial word can exist in the FIFO even when the FIFO is EMPTY. Therefore, one or more writes might be needed before the final data in the FIFO can be read. When the FIFO is FULL, a single read deasserts FULL, after which two or more write operations are required to get it back to FULL again. 2. When the write port depth has a fractional part, the write depth value is rounded down. Because it takes multiple reads to read a complete write word, there might be partial write words in the FIFO at some points in time. If FULL, one or more additional read operations might free up enough space to make room for an additional write operation. UltraScale Architecture Memory Resources www.xilinx.com Send Feedback 56 UG573 (v1.2) February 24, 2015
Chapter 2: Built-in FIFO Table 2-5: Write Port Width Common-Clock FIFO Port Width and Depths – FIFO18E2 Read Port Width Latch Mode (REGISTER_MODE = "UNREGISTERED") Write Port Depth Register Mode (REGISTER_MODE = "REGISTERED") Standard FWFT Standard FWFT Read Port Depth Write Port Depth Read Port Depth Write Port Depth Read Port Depth Write Port Depth Read Port Depth 4 4 4096 4096 4097 4097 4097 4097 4098 4098 4 8 4096 2048 4098 2049 4098 2049 4100 2050 4 16 4096 1024 4100 1025 4100 1025 4104 1026 4 32 4096 512 4104 513 4104 513 4112 514 8 4 2048 4096 2048 (1) 4097 2048 (1) 4097 2049 4098 9 9 2048 2048 2049 2049 2049 2049 2050 2050 9 18 2048 1024 2050 1025 2050 1025 2052 1026 9 36 2048 512 2052 513 2052 513 2056 514 16 4 1024 4096 1024 (1) 4097 1024 (1) 4097 1024 (1) 4098 18 9 1024 2048 1024 (1) 2049 1024 (1) 2049 1025 2050 18 18 1024 1024 1025 1025 1025 1025 1026 1026 18 36 1024 512 1026 513 1026 513 1028 514 32 4 512 4096 512 (1) 4097 512 (1) 4097 512 (1) 4098 36 9 512 2048 512 (1) 2049 512 (1) 2049 512 (1) 2050 36 18 512 1024 512 (1) 1025 512 (1) 1025 513 1026 36 36 512 512 513 513 513 513 514 514 Notes: 1. When the write port depth has a fractional part, the write depth value is rounded down. Because it takes multiple reads to read a complete write word, there might be partial write words in the FIFO at some points in time. If FULL, one or more additional read operations might free up enough space to make room for an additional write operation. UltraScale Architecture Memory Resources www.xilinx.com Send Feedback 57 UG573 (v1.2) February 24, 2015
Page 1 and 2:
UltraScale Architecture Memory Reso
Page 3 and 4:
Table of Contents Revision History
Page 5 and 6: Chapter 1 Block RAM Resources Intro
Page 7 and 8: Chapter 1: Block RAM Resources •
Page 9 and 10: Chapter 1: Block RAM Resources •
Page 11 and 12: Chapter 1: Block RAM Resources Tabl
Page 13 and 14: Chapter 1: Block RAM Resources NO_C
Page 15 and 16: Chapter 1: Block RAM Resources Simp
Page 17 and 18: Chapter 1: Block RAM Resources capa
Page 19 and 20: Chapter 1: Block RAM Resources Stan
Page 21 and 22: Chapter 1: Block RAM Resources Data
Page 23 and 24: Chapter 1: Block RAM Resources Byte
Page 25 and 26: Chapter 1: Block RAM Resources Figu
Page 29 and 30: Chapter 1: Block RAM Resources Regi
Page 33 and 34: Chapter 1: Block RAM Resources CASD
Page 39 and 40: Chapter 1: Block RAM Resources Cont
Page 41 and 42: Chapter 1: Block RAM Resources Read
Page 43 and 44: Chapter 1: Block RAM Resources Opti
Page 45 and 46: Chapter 1: Block RAM Resources Addi
Page 47 and 48: Chapter 1: Block RAM Resources Bloc
Page 49 and 50: Chapter 2 Built-in FIFO Overview Ma
Page 51 and 52: Chapter 2: Built-in FIFO Table 2-1:
Page 55: Chapter 2: Built-in FIFO Table 2-3:
Page 59 and 60: Chapter 2: Built-in FIFO Figure 2-3
Page 65 and 66: Chapter 2: Built-in FIFO FIFO18/36
Page 69 and 70: Chapter 2: Built-in FIFO • MIDDLE
Page 71 and 72: Chapter 2: Built-in FIFO FWFT Mode
Page 73 and 74: Chapter 2: Built-in FIFO FIFO might
Page 75 and 76: Chapter 2: Built-in FIFO the status
Page 77 and 78: Chapter 2: Built-in FIFO X-Ref Targ
Page 83 and 84: Chapter 3: Built-in Error Correctio
Page 89 and 90: Appendix A Additional Resources and
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