Altera HyperTransport MegaCore Function - Manual (Page 8)

1–4 Chapter 1: About this MegaCore Function
Performance
HyperTransport MegaCore Function User Guide © November 2009 Altera Corporation
Preliminary
Table 1–4 shows performance and device utilization for the HyperTransport
MegaCore function in Stratix II and Stratix II GX devices.
Table 1–5 shows performance and device utilization for the HyperTransport
MegaCore function in Stratix and Stratix GX devices.
Table 1–4. HyperTransport MegaCore Function Performance in Stratix II and Stratix II GX Devices
Parameters
Combinational
ALUTs
(2)
Logic
Registers
Memory
HT Link
f
MAX
(MHz)
(3)
User
Interface
f
MAX
(MHz)
(3)
Rx
Posted
Buffers
Rx
Non-Posted
Buffers
Rx
Response
Buffers
Clocking
Option (1) M4K M512
8 4 4 Shared
Rx/Tx/Ref
3,500 5,200 12 0 500 125 (4)
8 4 4 Shared
Ref/Tx
3,500 5,200 14 0 500 125 (4)
8 4 4 Shared
Rx/Tx
3,600 5,400 16 0 500 > 150
8 8 8 Shared
Rx/Tx
4,000 6,000 16 0 500 > 150
16 8 8 Shared
Rx/Tx/Ref
4,100 6,200 12 0 500 125 (4)
16 8 8 Shared
Ref/Tx
4,100 6,200 14 0 500 125 (4)
16 8 8 Shared
Rx/Tx
4,200 6,400 16 0 500 > 150
Notes to Table 1–4 :
(1) Refer to “Clocking Options” on page 3–7 for more information about these options.
(2) Other parameters (BAR configurations, etc.) vary the ALUT and Logic Register utilization numbers by approximately +/- 200.
(3) Figures for -3 speed grade devices only.
(4) When using the Shared Rx/Tx/Ref and Shared Ref/Tx options, the user interface frequency is limited to exactly the HT frequency divided by
four.
Table 1–5. HyperTransport MegaCore Function Performance in Stratix and Stratix GX Devices
Parameters Utilization HT Link f
MAX
(MHz)
User Interface f
MAX
(MHz)
Rx
Posted
Buffers
Rx
Non-Posted
Buffers
Rx
Response
Buffers
Clocking Option
(1)
LEs
(2)
M4K
Blocks
Speed Grade
-5 -6 -5 -6
8 4 4 Shared Rx/Tx/Ref 7,500 12 400 400 100 (3) 100 (3)
8 4 4 Shared Ref/Tx 7,600 14 400 400 100 (3) 100 (3)
8 4 4 Shared Rx/Tx 7,900 16 400 400 > 125 > 100
8 8 8 Shared Rx/Tx 8,900 16 400 400 > 125 > 100
16 8 8 Shared Rx/Tx/Ref 9,400 12 400 400 100 (3) 100 (3)
16 8 8 Shared Ref/Tx 9,500 14 400 400 100 (3) 100 (3)
16 8 8 Shared Rx/Tx 9,700 16 400 400 > 125 > 100
Notes to Table 1–5 :
(1) Refer to “Clocking Options” on page 3–7 for more information about these options.
(2) Other parameters (BAR configurations etc.) vary the LE utilization by approximately +/- 200 LEs.
(3) When using the Shared Rx/Tx/Ref and Shared Ref/Tx options, the user interface frequency is limited to exactly the HT frequency divided by four.