AM49BDS640AHD8I SPANSION [SPANSION], AM49BDS640AHD8I Datasheet - Page 12
AM49BDS640AHD8I
Manufacturer Part Number
AM49BDS640AHD8I
Description
Stacked Multichip Package (MCP), Flash Memory and pSRAM CMOS 1.8 Volt-only Simultaneous Read/Write
Manufacturer
SPANSION [SPANSION]
Datasheet
1.AM49BDS640AHD8I.pdf
(84 pages)
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PIN DESCRIPTION
A19–A0
A21–A20
DQ15–DQ0
CE#f
CE1#s
CE2s
OE#
WE#
UB#s
LB#s
RESET#
V
V
V
V
V
NC
RDY
CLK
AVD#
10
CC
IO
CC
SSIO
SS
f
f
s
f
= 20 Address Inputs (Common)
= 2 Address Inputs (Flash)
= 16 Data Inputs/Outputs (Common)
= Chip Enable (Flash)
= Chip Enable 1 (SRAM)
= Chip Enable 2 (SRAM)
= Output Enable (Common)
= Write Enable (Common)
= Upper Byte Control (pSRAM)
= Lower Byte Control (pSRAM)
= Hardware Reset Pin, Active Low
= Flash 1.8 volt-only single power
= Input & Output Buffer Power Supply
= SRAM Power Supply
= Output Buffer Ground
= Device Ground (Common)
= Pin Not Connected Internally
= Ready output; indicates the status of
= CLK is not required in asynchronous
= Address Valid input. Indicates to de-
supply (see Product Selector Guide
for speed options and voltage supply
tolerances)
must be tied to V
the Burst read. Low = data not valid
at expected time. High = data valid.
mode. In burst mode, after the initial
word is output, subsequent active
edges of CLK increment the internal
address counter.
vice that the valid address is present
on the address inputs (A21–A0).
Low = for asynchronous mode, indi-
cates valid address; for burst mode,
causes starting address to be
latched.
A D V A N C E
CC
Am49BDS640AH
I N F O R M A T I O N
WP#
ACC
LOGIC SYMBOL
20
A21–A20
CE#f
CE1#s
CE2s
OE#
WE#
WP#
RESET#
UB#s
LB#s
ACC
AVD#
A19–A0
CLK
= Hardware write protect input. At V
= At V
High = device ignores address in-
puts
disables program and erase func-
tions in the two outermost sectors.
Should be at V
tions.
automatically places device in un-
lock bypass mode. At V
sectors. Should be at V
other conditions.
ID
DQ15–DQ0
, accelerates programming;
RDY
IH
December 5, 2003
for all other condi-
16
IH
IL
, locks all
for all
IL
,
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