SST79LF008 Datasheet, PDF (156/252 Pages) Silicon Storage Technology, Inc – Mobile Platform Controller plus 8 Mbit LPC Firmware Flash

Advance Information
TABLE 11-1: Possible Addresses for Slaves 1 and 2
Target Slave
Slave 1 only
Given Address
1111 0X0X
Slave 2 only
1111 0XX1
Slave 1 and 2
1111 0XXX
Mobile Platform Controller
8 Mbit LPC Firmware Flash
SST79LF008
All Possible Addresses
1111 0000
1111 0100
1111 0111
1111 0011
1111 0001
1111 0101
T11-1.0 1320
If the user added a third slave, the slave 3 example in Table
11-2 provides its Given Address calculation, and Table 11-
2 indicates all possible addresses for Slave 3 and the com-
bination of Slaves 2 and 3.
Slave 3
SADDR
=
SADEN
=
GIVEN
=
1111
1111
1111
1001
0101
X0X1
TABLE 11-2: Possible Addresses for Slave 3 and Slave 2/3 Combination
Target Slave
Slave 3 only
Given Address
1111 X0X1
Slave 2 and 3 only
1111 XXX1
All Possible Addresses
1111 1011
1111 1001
1111 0011
T11-2.0 1320
11.3.2 Using the Broadcast Address to Select Slaves
Using the Broadcast Address, the master can communi-
cate with all the slaves at once. The broadcast address is
formed by performing a logical OR of SADDR and SADEN
with zeros in the result treated as “don’t cares”.
Slave 1
1111 0001
+ 1111 1010
1111 1X11
= SADDR
= SADEN
= Broadcast
“Don’t cares” allow for a wider range in defining the Broad-
cast Address, but in most cases, the Broadcast Address
will be FFH.
On reset, SADDR and SADEN are ‘0’. This produces a
Given Address of all “don’t cares” as well as a Broadcast
Address of all “don’t cares”. This effectively disables Auto-
matic Addressing mode.
©2006 Silicon Storage Technology, Inc.
156
S71320-01-000
10/06