NH82801FBM S L89K Intel, NH82801FBM S L89K Datasheet - Page 219
NH82801FBM S L89K
Manufacturer Part Number
NH82801FBM S L89K
Description
Manufacturer
Intel
Datasheet
1.NH82801FBM_S_L89K.pdf
(786 pages)
Specifications of NH82801FBM S L89K
Lead Free Status / RoHS Status
Compliant
- Current page: 219 of 786
- Download datasheet (5Mb)
5.21.3
5.21.3.1
5.21.3.2
Intel
®
I/O Controller Hub 6 (ICH6) Family Datasheet
Bus Timing
Clock Stretching
Some devices may not be able to handle their clock toggling at the rate that the ICH6 as an SMBus
master would like. They have the capability of stretching the low time of the clock. When the ICH6
attempts to release the clock (allowing the clock to go high), the clock will remain low for an
extended period of time.
The ICH6 monitors the SMBus clock line after it releases the bus to determine whether to enable
the counter for the high time of the clock. While the bus is still low, the high time counter must not
be enabled. Similarly, the low period of the clock can be stretched by an SMBus master if it is not
ready to send or receive data.
Bus Time Out (Intel
If there is an error in the transaction, such that an SMBus device does not signal an acknowledge,
or holds the clock lower than the allowed time-out time, the transaction will time out. The ICH6
will discard the cycle and set the DEV_ERR bit. The time out minimum is 25 ms (800 RTC
clocks). The time-out counter inside the ICH6 will start after the last bit of data is transferred by the
ICH6 and it is waiting for a response.
The 25 ms timeout counter will not count under the following conditions:
1. BYTE_DONE_STATUS bit (SMBus I/O Offset 00h, bit 7) is set
2. The SECOND_TO_STS bit (TCO I/O Offset 06h, bit 1) is not set (this indicates that the
system has not locked up)
®
ICH6 as SMBus Master)
Functional Description
219
Related parts for NH82801FBM S L89K
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Intel
Datasheet:
Part Number:
Description:
Microprocessor: Intel Celeron M Processor 320 and Ultra Low Voltage Intel Celeron M Processor at 600MHz
Manufacturer:
Intel Corporation
Part Number:
Description:
Intel 82550 Fast Ethernet Multifunction PCI/CardBus Controller
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 32 Mbit. Access speed 120 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 32 Mbit. Access speed 120 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 64 Mbit. Access speed 150 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
Intel StrataFlash memory 32 Mbit. Access speed 100 ns
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
DA28F640J5A-1505 Volt Intel StrataFlash Memory
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
5 Volt Intel StrataFlash?? Memory
Manufacturer:
Intel Corporation
Datasheet:
Part Number:
Description:
5 Volt Intel StrataFlash?? Memory
Manufacturer:
Intel Corporation
Part Number:
Description:
Intel 6300ESB I/O Controller Hub
Manufacturer:
Intel Corporation
Datasheet: