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8 Mbit LPC Flash
A Microchip Technology Company
SST49LF080A
Data Sheet
Registers
There are two registers available on the SST49LF080A, the General Purpose Inputs Registers
(GPI_REG) and the JEDEC ID Registers. Since multiple LPC memory devices may be used to
increase memory densities, these registers appear at its respective address location in the 4 GByte
system memory map. Unused register locations will read as 00H. Any attempt to read registers during
internal Write operation will respond as “Write operation status detection” (Data# Polling or Toggle Bit).
Any attempt to write any registers during internal Write operation will be ignored. Table 9 lists
GPI_REG and JEDEC ID address locations for SST49LF080A with its respective device strapping.
Table 8: General Purpose Inputs Register
Pin #
Bit
7:5
4
Function
Reserved
GPI[4]
32-PLCC
-
30
32-TSOP
-
6
Reads status of general
purpose input pin
3
GPI[3]
3
11
Reads status of general
purpose input pin
2
GPI[2]
4
12
Reads status of general
purpose input pin
1
GPI[1]
5
13
Reads status of general
purpose input pin
0
GPI[0]
6
14
Reads status of general
purpose input pin
T8.0 25026
?2011 Silicon Storage Technology, Inc.
15
DS25086A
11/11
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