82NM10 Datasheet, PDF (92/671 Pages) Intel Corporation – Intel® NM10 Family Express Chipset

Functional Description
between the LAN controller and the integrated ASF controller (if enabled) or an external
management controller. An EEPROM of 256 words is required to support the heartbeat
command.
5.3.5.1
Advanced TCO Mode
The Advanced TCO functionalities through the SMLink are listed in Table 5-32.
Table 5-32.Advanced TCO Functionality
Power State
D0 nominal
Dx (x>0)
Force TCO Mode
TCO Controller Functionality
Transmit
Set Receive TCO Packets
Receive TCO Packets
Read Chipset status (PM & Link state)
Force TCO Mode
D0 functionality plus:
Read PHY registers
Dx functionality plus:
Configuration commands
Read/Write PHY registers
Note:
For a complete description on various commands, see the Total Cost of Ownership
(TCO) System Management Bus Interface Application Note (AP-430).
Transmit Command during Normal Operation
To serve a transmit request from the TCO controller, Chipset LAN controller first
completes the current transmit DMA, sets the TCO request bit in the PMDR register (see
Section 11.2), and then responds to the TCO controller’s transmit request. Following
the completion of the TCO transmit DMA, the LAN controller increments the Transmit
TCO statistic counter (described in Section 11.2.14). Following the completion of the
transmit operation, Chipset increments the nominal transmit statistic counters, clears
the TCO request bit in the PMDR register, and resumes its normal transmit flow. The
receive flow is not affected during this entire period of time.
Receive TCO
Chipset LAN controller supports receive flow towards the TCO controller. Chipset can
transfer only TCO packets, or all packets that passed MAC address filtering according to
its configuration and mode of operation as detailed below. While configured to transfer
only TCO packets, it supports Ethernet type II packets with optional VLAN tagging.
Force TCO Mode: While Chipset is in the force TCO mode, it may receive packets (TCO
or all) directly from the TCO controller. Receiving TCO packets and filtering level is
controlled by the set Receive enable command from the TCO controller. Following a
reception of a TCO packet, Chipset increments its nominal Receive statistic counters as
well as the Receive TCO counter.
92
Datasheet