NH82801HEM S LB9B Intel, NH82801HEM S LB9B Datasheet - Page 235
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NH82801HEM S LB9B
Manufacturer Part Number
NH82801HEM S LB9B
Description
Manufacturer
Intel
Datasheet
1.NH82801HEM_S_LB9B.pdf
(890 pages)
Specifications of NH82801HEM S LB9B
Lead Free Status / RoHS Status
Compliant
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Functional Description
5.20.7.2
Table 94.
Table 95.
Intel
®
ICH8 Family Datasheet
Format of Read Command
The external master performs Byte Read commands to the ICH8 SMBus Slave I/F. The
“Command” field (bits 18:11) indicate which register is being accessed. The Data field
(bits 30:37) contain the value that should be read from that register.
Slave Read Cycle Format
Data Values for Slave Read Registers (Sheet 1 of 2)
Register
11–18
21–27
30–37
2–8
Bit
10
19
20
28
29
38
39
1
9
0
1
2
3
4
Start
Slave Address - 7 bits
Write
ACK
Command code – 8 bits
ACK
Repeated Start
Slave Address - 7 bits
Read
ACK
Data Byte
NOT ACK
Stop
Bits
7:0
2:0
7:3
3:0
7:4
5:0
7:6
Description
0
1
Reserved for capabilities indication. Should always return 00h. Future chips
may return another value to indicate different capabilities.
System Power State
000 = S0 001 = S1 010 = Reserved 011 = S3
100 = S4 101 = S5 110 = Reserved 111 = Reserved
Reserved
Reserved
Reserved
Watchdog Timer current value. Note that Watchdog Timer has 10 bits,
but this field is only 6 bits. If the current value is greater than 3Fh, ICH8
will always report 3Fh in this field.
Reserved
1 = The Intruder Detect (INTRD_DET) bit is set. This indicates that the
system cover has probably been opened.
1 = BTI Temperature Event occurred. This bit will be set if the Intel
ICH8’s THRM# input signal is active.
External Microcontroller
External Microcontroller
External Microcontroller
Intel ICH8
External Microcontroller
Intel ICH8
External Microcontroller
External Microcontroller
External Microcontroller
Intel ICH8
Intel ICH8
External Microcontroller
External Microcontroller
Driven by:
Description
Must match value in Receive Slave
Address register.
Always 0
Indicates which register is being
accessed. See
list of implemented registers.
Must match value in Receive Slave
Address register
Always 1
Value depends on register being
accessed.
implemented registers.
Table 95
Comment:
Table 95
below for list of
below for
235
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