MT46V64M16P-6T IT:A Micron, MT46V64M16P-6T IT:A Datasheet - Page 34
MT46V64M16P-6T IT:A
Manufacturer Part Number
MT46V64M16P-6T IT:A
Description
DRAM Chip DDR SDRAM 1G-Bit 64Mx16 2.5V 66-Pin TSOP Tray
Manufacturer
Micron
Datasheet
1.MT46V64M16P-6TITA.pdf
(82 pages)
- Current page: 34 of 82
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Commands
Table 22:
Table 23:
PDF: 09005aef80768abb/Source: 09005aef82a95a3a
DDR_x4x8x16_Core2.fm - 1Gb DDR: Rev. J; Core DDR Rev. E 7/11 EN
Function
DESELECT
NO OPERATION (NOP)
ACTIVE (select bank and activate row)
READ (select bank and column and start READ burst)
WRITE (select bank and column and start WRITE burst)
BURST TERMINATE
PRECHARGE (deactivate row in bank or banks)
AUTO REFRESH or SELF REFRESH
(enter self refresh mode)
LOAD MODE REGISTER
Name (Function)
Write enable
Write inhibit
Truth Table 1 – Commands
CKE is HIGH for all commands shown except SELF REFRESH; All states and sequences not shown are illegal or
reserved
Truth Table 2 – DM Operation
Used to mask write data, provided coincident with the corresponding data
Notes:
Tables 22 and 23 provide a quick reference of available commands. Two additional Truth
Tables—Table 24 on page 35 and Table 25 on page 36—provide current state/next state
information.
1. DESELECT and NOP are functionally interchangeable.
2. BA[1:0] provide bank address and A[n:0] (128Mb: n = 11; 256Mb and 512Mb: n = 12; 1Gb: n
3. BA[1:0] provide bank address; A[i:0] provide column address, (where Ai is the most signifi-
4. Applies only to READ bursts with auto precharge disabled; this command is undefined (and
5. A10 LOW: BA[1:0] determine which bank is precharged. A10 HIGH: all banks are precharged
6. This command is AUTO REFRESH if CKE is HIGH; SELF REFRESH if CKE is LOW.
7. Internal refresh counter controls row addressing while in self refresh mode, all inputs and
8. BA[1:0] select either the mode register or the extended mode register (BA0 = 0, BA1 = 0
= 13) provide row address.
cant column address bit for a given density and configuration, see Table 2 on page 2) A10
HIGH enables the auto precharge feature (non persistent), and A10 LOW disables the auto
precharge feature.
should not be used) for READ bursts with auto precharge enabled and for WRITE bursts.
and BA[1:0] are “Don’t Care.”
I/Os are “Don’t Care” except for CKE.
select the mode register; BA0 = 1, BA1 = 0 select extended mode register; other combina-
tions of BA[1:0] are reserved). A[n:0] provide the op-code to be written to the selected
mode register.
DM
34
H
L
CS#
H
L
L
L
L
L
L
L
L
Micron Technology, Inc., reserves the right to change products or specifications without notice.
RAS#
H
H
H
H
X
L
L
L
L
CAS#
1Gb: x4, x8, x16 DDR SDRAM
X
H
H
H
H
L
L
L
L
WE#
H
H
H
H
X
L
L
L
L
©2000 Micron Technology, Inc. All rights reserved.
Valid
DQ
Bank/row
Address
X
Bank/col
Bank/col
Op-code
Code
X
X
X
X
Commands
Notes
6, 7
1
1
2
3
3
4
5
8
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