![](http://datasheet.mmic.net.cn/180000/MT58L128V36P1B-4_datasheet_11334059/MT58L128V36P1B-4_10.png)
10
4Mb: 256K x 18, 128K x 32/36 Pipelined, SCD SyncBurst SRAM
Micron Technology, Inc., reserves the right to change products or specifications without notice.
MT58L256L18P1_D.p65 – Rev. 10/01
2001, Micron Technology, Inc.
4Mb: 256K x 18, 128K x 32/36
PIPELINED, SCD SYNCBURST SRAM
FBGA PIN DESCRIPTIONS (continued)
x18
x32/x36
SYMBOL
TYPE
DESCRIPTION
9B
ADSP#
Input
Synchronous Address Status Processor: This active LOW input
interrupts any ongoing burst, causing a new external address to be
registered. A READ is performed using the new address,
independent of the byte write enables and ADSC#, but dependent
upon CE#, CE2 and CE2#. ADSP# is ignored if CE# is HIGH. Power-
down state is entered if CE2 is LOW or CE2# is HIGH.
8A
ADSC#
Input
Synchronous Address Status Controller: This active LOW input
interrupts any ongoing burst, causing a new external address to be
registered. A READ or WRITE is performed using the new address if
CE# is LOW. ADSC# is also used to place the chip into power-down
state when CE# is HIGH.
1R
MODE
Input
Mode: This input selects the burst sequence. A LOW on this input
(LB0#)
selects “l(fā)inear burst.” NC or HIGH on this input selects “interleaved
burst.” Do not alter input state while device is operating.
(a) 10J, 10K,
DQa
Input/ SRAM Data I/Os: For the x18 version, Byte “a” is associated DQas;
10L, 10M, 11D, 10L, 10M, 11J,
Output Byte “b” is associated with DQbs. For the x32 and x36 versions,
11E, 11F, 11G 11K, 11L, 11M
Byte “a” is associated with DQas; Byte “b” is associated with DQbs;
(b) 1J, 1K,
(b) 10D, 10E,
DQb
Byte “c” is associated with DQcs; Byte “d” is associated with DQds.
1L, 1M, 2D,
10F, 10G, 11D,
Input data must meet setup and hold times around the rising edge
2E, 2F, 2G
11E, 11F, 11G
of CLK.
(c) 1D, 1E,
DQc
1F, 1G, 2D,
2E, 2F, 2G
(d) 1J, 1K, 1L,
DQd
1M, 2J, 2K,
2L, 2M
11C
11N
NC/DQPa
NC/
No Connect/Parity Data I/Os: On the x32 version, these are No
1N
11C
NC/DQPb
I/O
Connect (NC). On the x18 version, Byte “a” parity is DQPa; Byte “b”
–
1C
NC/DQPc
parity is DQPb. On the x36 version, Byte “a” parity is DQPa; Byte
–
1N
NC/DQPd
“b” parity is DQPb; Byte “c” parity is DQPc; Byte “d” parity is DQPd.
1H, 4D, 4E, 4F, 1H, 4D, 4E, 4F,
VDD
Supply Power Supply: See DC Electrical Characteristics and Operating
4G, 4H, 4J,
Conditions for range.
4K, 4L, 4M,
8D, 8E, 8F,
8G, 8H, 8J,
8K, 8L, 8M
3C, 3D, 3E,
VDDQ
Supply Isolated Output Buffer Supply: See DC Electrical Characteristics and
3F, 3G, 3J,
Operating Conditions for range.
3K, 3L, 3M,
3N, 9C, 9D,
9E, 9F, 9G,
9J, 9K, 9L,
9M, 9N
(continued on next page)