SST49LF008C-33-4C-NH View Datasheet(PDF) - Silicon Storage Technology
Part Name
Description
MFG CO.
SST49LF008C-33-4C-NH Datasheet PDF : 36 Pages
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Advance Information
Multiple Device Selection
Multiple LPC firmware flash devices may be strapped to
increase memory densities in a system. The four ID pins,
ID[3:0], allow up to 16 devices to be attached to the same
bus by using different ID strapping in a system. BIOS sup-
port, bus loading, or the attaching bridge may limit this num-
ber. The boot device must have an ID of 0000b (determined
by ID[3:0]); subsequent devices use incremental number-
ing. Equal density must be used with multiple devices.
Multiple Device Selection for
Firmware Memory Cycle
For Firmware Memory Read/Write cycles, hardware strap-
ping values on ID[3:0] must match the values in IDSEL
field. The SST49LF00xC will compare these bits with
ID[3:0]’s strapping values. If there is a mismatch, the device
will ignore the remainder of the cycle. See Table 7 for Multi-
ple Device Selection Configuration.
4 Mbit / 8 Mbit LPC Serial Flash
SST49LF004C / SST49LF008C
TABLE 7: FIRMWARE MEMORY MULTIPLE DEVICE
SELECTION CONFIGURATION
Device #
0 (Boot device)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
ID[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
IDSEL
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
T7.0 1292
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