3 Mbit LPC Flash
SST49LF030A
EOL Product Data Sheet
TABLE 1: Pin Description
Interface
Symbol
A
10
-A
0
Pin Name
Address
Type
1
I
PP LPC Functions
X
Inputs for low-order addresses during Read and Write operations. Addresses are
internally latched during a Write cycle. For the programming interface, these
addresses are latched by R/C# and share the same pins as the high-order
address inputs.
X
To output data during Read cycles and receive input data during Write cycles.
Data is internally latched during a Write cycle. The outputs are in tri-state when
OE# is high.
X
To gate the data output buffers.
X
To control the Write operations.
X
X
This pin determines which interface is operational. When held high, programmer
mode is enabled and when held low, LPC mode is enabled. This pin must be
setup at power-up or before return from reset and not change during device oper-
ation. This pin must be held high (V
IH
) for PP mode and low (V
IL
) for LPC mode.
X
This is the second reset pin for in-system use. This pin is internally combined
with the RST# pin; If this pin or RST# pin is driven low, identical operation is
exhibited.
X
These four pins are part of the mechanism that allows multiple parts to be attached
to the same bus. The strapping of these pins is used to identify the component.The
boot device must have ID[3:0]=0000 for all subsequent devices should use sequen-
tial up-count strapping. These pins are internally pulled-down with a resistor
between 20-100 KΩ
X
These individual inputs can be used for additional board flexibility. The state of
these pins can be read through LPC registers. These inputs should be at their
desired state before the start of the PCI clock cycle during which the read is
attempted, and should remain in place until the end of the Read cycle. Unused
GPI pins must not be floated.
X
When low, prevents programming to the boot block sectors at top of memory.
When TBL# is high it disables hardware write protection for the top block sectors.
This pin cannot be left unconnected.
X
To provide LPC control signals, as well as addresses and Command
Inputs/Outputs data.
X
To provide a clock input to the control unit
X
To indicate start of a data transfer operation; also used to abort an LPC cycle
in progress.
X
X
To reset the operation of the device
X
When low, prevents programming to all but the highest addressable blocks.
When WP# is high it disables hardware write protection for these blocks.
This pin cannot be left unconnected.
X
Select for the Programming interface, this pin determines whether the address
pins are pointing to the row addresses, or to the column addresses.
X
These pins must be left unconnected.
X
X
To provide power supply (3.0-3.6V)
X
X
Circuit ground (0V reference)
X
This signal must be asserted to select the device. When CE# is low, the device
is enabled. When CE# is high, the device is placed in low power standby mode.
X
X
Unconnected pins.
T1.0 1234
DQ
7
-DQ
0
Data
I/O
OE#
WE#
MODE
Output Enable
Write Enable
Interface
Mode Select
I
I
I
INIT#
Initialize
I
ID[3:0]
Identification
Inputs
I
GPI[4:0]
General
Purpose Inputs
I
TBL#
Top Block Lock
I
Address and
Data
LCLK
Clock
LFRAME# Frame
RST#
WP#
Reset
Write Protect
LAD[3:0]
I/O
I
I
I
I
R/C#
RES
V
DD
V
SS
CE#
NC
Row/Column
Select
Reserved
Power Supply
Ground
Chip Enable
No Connection
I
PWR
PWR
I
I
1. I=Input, O=Output
©2005 Silicon Storage Technology, Inc.
S71234-03-EOL
5/06
8
SST [ SILICON STORAGE TECHNOLOGY, INC ]
