K4Y50164UC Datasheet, PDF (44/76 Pages) Samsung semiconductor – 512Mbit XDR TM DRAM(C-die)

K4Y50164UC
K4Y50084UC
K4Y50044UC
K4Y50024UC
XDR^TM DRAM
10.3 Calibration Transactions
Figure45 shows the calibration transaction diagrams for the XDR DRAM device. There is one calibration operation supported: calibration
of the output current level I_OL, each DQi and DQNi pin.
The output current calibration sequence is shown in the upper diagram. It begins when a period of t_CMD-CALC is observed after the last
RQ packet (with command “CMD a” in this example). No request packets should be issued in this period.
A COLX packet with a “CALC b” command is then issued to start the current calibration sequence. A period of t_CALCE is observed after
this packet. No request packets should be issued during this period.
A COLX packet with a “CALE c” command is then issued to end the current calibration sequence. A period of t_CALE-CMD is observed after
this packet. No request packets should be issued during this period. The first request packet may then be issued (with command “CMD
d” in this example).
A second current calibration sequence must be started within an interval of t_CALC. In this example. the next COLX packet with a “CALC
e” command starts a subsequent sequence.
The dynamic termination calibration sequence is shown in the lower diagram. Note that this memory component does not use this
sequence; termination calibraion is performed during the manufacturing process. However, the termination sequence shown will be
issued by the controller for those memory component which do use a periodic calibration mechanism.
It begins when a period of t_CMD-CALZC is observed after the packet edge T₀(with command CMDa in this example). No request packets
should be issued in this period.
A COLX packet with a CALZ command is then issued at edge T₃ to start the current calibration sequence. A second period of t_CALZE is
ovserved after this packet. No request packets should be issued during this period.
A COLX packet with a CALE command is then issued at dege T₆ to end the current calibration sequence. A third period of t_CALE-CMD is
observed after this pakets. No request packets should be issued during this period. The first request pakcet may be issued at edge
T₁₂(with command CMDd in this example).
A second current calibration sequence must be started within an interval of t_CALZ. In this example, the next COLX pakcet with a CALZ
command occurs at edge T₂₀.
Note that the labels for the CFM clock edges(of the form Ti) are not to scale, and are used to identify events in the diagrams.
Figure 45 : Calibration Transactions
C^CFF^MM
CCFFMMNN
R^RQQ¹1¹1^...⁰.0
DQ15..0
DQN15..0
T₀ T₁ T₂ T₃ T₄ T₅ T₆ T₇ T₈ T₉ T₁₀ T₁₁ T₁₂ T₁₃ T₁₄ T₁₅ T₁₆ T₁₇ T₁₈ T₁₉ T₂₀ T₂₁ T₂₂ T₂₃
CMD
a
t_CALCE,
CALC
CALE
b
c
t_CMD-CALC
t_CALE-CMD,
CMD
d
t_CALC
CALC
e
t_CYCLE
Packet a: Any CMD
Packet b: CALC
Packet c: CALE
Packet d: Any CMD
Packet e: CALC
Current Calibration Transaction
C^CFF^MM
C^CFF^MM^NN
R^RQ^Q11¹1^...⁰.0
DQ15..0
DQN15..0
T₀ T₁ T₂ T₃ T₄ T₅ T₆ T₇ T₈ T₉ T₁₀ T₁₁ T₁₂ T₁₃ T₁₄ T₁₅ T₁₆ T₁₇ T₁₈ T₁₉ T₂₀ T₂₁ T₂₂ T₂₃
CMD
a
t_CALZE,
CALZ
CALE
b
c
t_CMD-CALZ
t_CALE-CMD,
CMD
d
t_CALZ
CALZ
e
t_CYCLE
Packet a: Any CMD
Packet b: CALZ
Packet c: CALE
Packet d: Any CMD
Packet e: CALZ
Termination Calibration Transaction
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Rev. 1.1 August 2006