Altera ALTDLL - Manual (Page 68)

Chapter 4: Functional Description 4–32
ALTDLL Megafunction Ports
© February 2012 Altera Corporation ALTDLL and ALTDQ_DQS Megafunctions User Guide
Table 4–10 lists the output ports of the ALTDLL megafunction.
Table 4–10. ALTDLL Megafunction Output Ports
Port Name
Optional/
Required
Default Function
dll_delayctrlout
[5..0]
Required — This is the DLL's delay setting output. This is a
1-cycle-delayed value of the current delay chain setting of
the DLL. This signal is Gray-coded to minimize jitter due to
toggling.This signal can feed the
dll_delayctrlin
input port of the ALTDQ_DQS megafunction or the core
logic. This output is available for SignalTap
® II Embedded
Logic Analyzer.
dll_dqsupdate Optional — This is an update-enable signal for the delay-setting
latches of the DQS pins. This signal can feed the
dqsupdateen input port of the ALTDQ_DQS
megafunction. This output is not available for SignalTap II
Embedded Logic Analyzer.
dll_offset_ctrl_a_
offsetctrlout[5..0]
Optional — This is the offsetctrlout output setting for
DLL_OFFSET_CTRL_A block. This is a registered
Gray-coded value of the delay-offset setting A. This output
can be adjusted based on the value of the
dll_offset_ctrl_a_use_offset parameter. This
signal can feed the offsetctrlin input port of the
ALTDQ_DQS megafunction. This signal is not available for
SignalTap II Embedded Logic Analyzer.
dll_offset_ctrl_b_
offsetctrlout[5..0]
Optional — This is the offsetctrlout output setting for
DLL_OFFSET_CTRL_B block. This is a registered
Gray-coded value of the delay-offset setting B. This output
can be adjusted based on the value of the
dll_offset_ctrl_b_use_offset parameter. This
signal can feed the offsetctrlin input port of the
ALTDQ_DQS megafunction. This signal is not available for
SignalTap II Embedded Logic Analyzer.