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3–12 Chapter 3: Functional Description—ALTMEMPHY (nonAFI)

ALTMEMPHY Signals

External Memory PHY Interface (ALTMEMPHY) (nonAFI) Megafunction User Guide © January 2010 Altera Corporation

The ports listed in Table 3–5 only exist when you target Stratix III and Stratix IV

devices. You can leave them unconnected if you are not using user-mode calibrated

OCT. For more information about StratixIII and StratixIV ports, refer to

ALTMEMPHY Signals section in chapter 5 of the DDR and DDR2 SDRAM

High-Performance Controllers and ALTMEMPHY IP User Guide.

Table 3–4. External DLL Signals for DDR2 and DDR SDRAM—nonAFI

Signal Name Type Width Description

dqs_delay_ctrl_

export

output 6 Allows sharing DLL in this ALTMEMPHY instance with another

ALTMEMPHY instance. Connect the

dqs_delay_ctrl_export port on the ALTMEMPHY

instance with a DLL to the dqs_delay_ctrl_import port

on the other ALTMEMPHY instance.

dqs_delay_ctrl_

import

input 6 Allows the use of DLL in another ALTMEMPHY instance in this

ALTMEMPHY instance. Connect the

dqs_delay_ctrl_export port on the ALTMEMPHY

instance with a DLL to the dqs_delay_ctrl_import port

on the other ALTMEMPHY instance.

dll_reference_

clk

output 1 Reference clock to feed to an externally instantiated DLL. This

clock is typically from one of the PHY PLL outputs.

Table 3–5. User-Mode Calibrated OCT Control Signals for DDR2/DDR SDRAM—nonAFI (Note 1), (2)

Signal Name Type Width Description

oct_ctl_rs_value input 14 Specifies serial termination value. Connects to the

seriesterminationcontrol bus of the ALT_OCT

megafunction. This port exists when you target Stratix IV and

Stratix III devices only.

oct_ctl_rt_value input 14 Specifies parallel termination value. Connects to the

parallelterminationcontrol bus of the ALT_OCT

megafunction. This port exists when you target Stratix IV and

Stratix III devices only.

Notes to Table 3–5:

(1) These ports are available if you want to use user-mode OCT calibration. Otherwise, they can be left unconnected.

(2) For more information on OCT, see the ALT_OCT Megafunction User Guide.

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