IDT 89HPES48T12G2, User Manual

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IDT SMBus Interfaces
PES48T12G2 User Manual 12 - 3 April 5, 2013
Notes
Figure 12.2 Single Double Word Initialization Sequence Format
The second type of configuration block is the sequential double word initialization sequence. It is similar
to a single double word initialization sequence except that it contains a double word count that allows
multiple sequential double words to be initialized in one configuration block.
A sequential double word initialization sequence consists of four required fields and one to 65535
double word initialization data fields. The format of a sequential double word initialization sequence is
shown in Figure 12.3. The TYPE field indicates the type of the configuration block. For sequential double
word initialization sequences, this value is always 0x1. The SYSADDR field contains the starting double
word system address to be initialized. The NUMDW field specifies the number of double words initialized by
the configuration block. This is followed by the number of DATA fields specified in the NUMDW field.
Figure 12.3 Sequential Double Word Initialization Sequence Format
Bit
0
Bit
1
Bit
2
Bit
3
Bit
4
Bit
5
Bit
6
Bit
7
Byte 1 SYSADDR[9:2]
TYPE
0x0
Byte 0
Byte 3 DATA[7:0]
Byte 4 DATA[15:8]
Byte 5 DATA[23:16]
Byte 6 DATA[31:24]
Byte 2 SYSADDR[18:10]
Reserved
(must be zero)
Bit
0
Bit
1
Bit
2
Bit
3
Bit
4
Bit
5
Bit
6
Bit
7
Byte 1 SYSADDR9:2]
Byte 3 NUMDW[7:0]
Byte 4 NUMDW[15:8]
Byte 5 DATA0[7:0]
Byte 6 DATA0[15:8]
Byte 7 DATA0[23:16]
Byte 8 DATA0[31:24]
Byte 4n+5 DATAn[7:0]
Byte 4n+ 6 DATAn[15:8]
Byte 4n+7 DATAn[23:16]
Byte 4n+8 DATAn[31:24]
... ...
TYPE
0x1
Byte 0
Byte 2 SYSADDR[18:10]
Reserved
(must be zero)