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參數(shù)資料
| 型號： | V58C2256164SBLJ5B |
| 廠商： | PROMOS TECHNOLOGIES INC |
| 元件分類： | DRAM |
| 英文描述： | 16M X 16 DDR DRAM, 0.65 ns, PBGA60 |
| 封裝： | LEAD FREE, MO-233, FBGA-60 |
| 文件頁數(shù)： | 22/62頁 |
| 文件大?。?/td> | 983K |
| 代理商： | V58C2256164SBLJ5B |
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29
ProMOS TECHNOLOGIES
V58C2256(804/404/164)SB
V58C2256(804/404/164)SB Rev. 1.0 November 2003
TRUTH TABLE 3 – Current State Bank n - Command to Bank n
(Notes: 1-6; notes appear below and on next page)
NOTE:
1. This table applies when CKEn-1 was HIGH and CKEn is HIGH (see Truth Table 2) and after
tXSR
has been met (if the previous state was self refresh).
2. This table is bank-specific, except where noted, i.e., the current state is for a specific bank and the commands shown
are those allowed to be issued to that bank when in that state. Exceptions are covered in the notes below.
3. Current state definitions:
Idle: The bank has been precharged, and tRP has been met.
Row Active: A row in the bank has been activated, and tRCD has been met.
No data bursts/accesses and no register accesses are in progress.
Read: A READ burst has been initiated, with AUTO PRECHARGE disabled,
and has not yet terminated or been terminated.
Write: A WRITE burst has been initiated, with AUTO PRECHARGE disabled,
and has not yet terminated or been terminated.
4. The following states must not be interrupted by a command issued to the same bank. DESELECT or NOP com-
mands,
or allowable commands to the other bank should be issued on any clock edge occurring during these states.
Allowable commands to the other bank are determined by its current state and Truth Table 3, and according to
Truth Table 4.
Precharging: Starts with registration of a PRECHARGE command and ends when tRP is
met. Once tRP is met, the bank will be in the idle state.
CURRENT STATE
/CS
/RAS
/CAS
/WE
COMMAND/ACTION
NOTES
Any
H
X
DESELECT (NOP/continue previous operation)
L
H
NO OPERATION (NOP/continue previous operation)
Idle
L
H
ACTIVE (select and activate row)
LLLH
AUTO REFRESH
7
L
MODE REGISTER SET
7
Row Active
L
H
L
H
READ (select column and start READ burst)
10
L
H
L
WRITE (select column and start WRITE burst)
10
L
H
L
PRECHARGE (deactivate row in bank or banks)
8
Read (Auto Precharge
Disabled)
L
H
L
H
READ (select column and start new READ burst)
10
L
H
L
PRECHARGE (truncate READ burst, start PRECHARGE)
8
L
H
L
BURST TERMINATE
9
Write (Auto Precharge
Disabled)
L
H
L
H
READ (select column and start READ burst)
10, 11
L
H
L
WRITE (select column and start new WRITE burst)
10
L
H
L
PRECHARGE (truncate WRITE burst, start PRECHARGE)
8, 11
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