MT47H64M16HR-3 L:HTR Micron Technology Inc, MT47H64M16HR-3 L:HTR Datasheet - Page 44
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MT47H64M16HR-3 L:HTR
Manufacturer Part Number
MT47H64M16HR-3 L:HTR
Description
Manufacturer
Micron Technology Inc
Datasheet
1.MT47H64M16HR-3_LHTR.pdf
(136 pages)
Specifications of MT47H64M16HR-3 L:HTR
Lead Free Status / Rohs Status
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31. V
32. For each input signal—not the group collectively.
33. There are two sets of values listed for command/address:
34. This is applicable to READ cycles only. WRITE cycles generally require additional time due to
35. READs and WRITEs with auto precharge are allowed to be issued before
36. When a single-bank PRECHARGE command is issued,
37. This parameter has a two clock minimum requirement at any
38. The
39. The minimum internal READ-to-PRECHARGE time. This is the time from which the last 4-bit prefetch begins to
40.
41. The refresh period is 64ms (commercial) or 32ms (industrial and automotive). This equates to an average refresh
42.
43.
44.
Table 33 (page 67). Single-ended DQS data timing is referenced at DQS crossing V
for a single-ended DQS strobe are listed in Table 34 (page 67)–Table 36 (page 68) on Table 34 (page 67),
Table 35 (page 68), and Table 36 (page 68); listed values are already derated for slew rate variations and con-
verted from baseline values to V
only) are equivalent to the baseline values of
t
rising signal and V
falling signal. If the command/address slew rate is not equal to 1 V/ns, then the baseline values must be derated
by adding the values from Table 29 (page 61) and Table 30 (page 62).
charge.
out feature is supported in DDR2 SDRAM.
CHARGE (ALL) command is issued, regardless of the number of banks open. For 8-bank devices ( 1Gb),
=
be issued in a given
when the PRECHARGE command can be issued. A 4-bit prefetch is when the READ command internally latches the
READ so that data will output CL later. This parameter is only applicable when
cies faster than 533 MHz when
to be satisfied as well. The DDR2 SDRAM will automatically delay the internal PRECHARGE command until
(MIN) has been satisfied.
t
t
ple, -37E at
4 + (4) clocks = 8 clocks.
rate of 7.8125μs (commercial) or 3.9607μs (industrial and automotive). To ensure all rows of all banks are properly
refreshed, 8192 REFRESH commands must be issued every 64ms (commercial) or 32ms (industrial and automotive).
The JEDEC
t
moved in a system RESET condition (see Reset (page 128)).
t
t
main at the valid input level the entire time it takes to achieve the three clocks of registration. Thus, after any
CKE transition, CKE may not transition from its valid level during the time period of
IS
DAL = (nWR) + (
CK refers to the application clock period; nWR refers to the
DELAY is calculated from
ISXR is equal to
CKE (MIN) of three clocks means CKE must be registered on three consecutive positive clock edges. CKE must re-
IL
t
b
RP (MIN) +
/V
,
t
t
IH
FAW (MIN) parameter applies to all 8-bank DDR2 devices. No more than four bank-ACTIVATE commands may
IH
DDR2 overshoot/undershoot. See AC Overshoot/Undershoot Specification (page 58).
b
, are the JEDEC-defined values, referenced from the logic trip points.
t
RFC MAX of 70,000ns is not required as bursting of AUTO REFRESH commands is allowed.
t
CK = 3.75ns with
t
CK (AVG) (Table 12 (page 34) lists
t
t
RP/
IS and is used for CKE setup time during self refresh exit, as shown in Figure 68 (page 119).
IL(AC)
t
t
FAW (MIN) period.
CK). Each of these terms, if not already an integer, should be rounded up to the next integer.
for a falling signal, while
t
IS +
t
WR programmed to four clocks would have
t
t
CK +
RTP = 7.5ns. If
REF
values.
t
IH so that CKE registration LOW is guaranteed prior to CK, CK# being re-
t
RRD (MIN) restriction still applies.
t
IS
t
RTP/(2 ×
b
t
RP [MIN] +
,
t
IH
t
IH
b
b
t
is referenced from V
RP timing applies.
at V
t
CK)
t
IS
REF
a
t
,
CK [AVG] MIN).
t
WR parameter stored in the MR9–MR11. For exam-
t
t
when the slew rate is 1 V/ns. The baseline values,
CK.
IH
1, then equation AL + BL/2 applies.
a
and
t
IS
t
b
t
RPA timing applies when the PRE-
RAS (MIN) is satisfied because
,
IL(DC)
t
t
DAL = 4 + (15ns/3.75ns) clocks =
IH
b
t
IS
. The
for a rising signal and V
t
RTP/(2 ×
b
REF
is referenced from V
t
. The correct timing values
t
IS
IS + 2 ×
a
,
t
t
CK) > 1, such as frequen-
IH
a
t
values (for reference
WR during auto pre-
t
CK +
t
RAS (MIN) has
t
IH.
IH(AC)
IH(DC)
t
t
RPA (MIN)
RAS lock-
t
RAS
for a
for a
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