PC8374L datasheet(139/239 Pages) NSC

139 / 239 page

8.0 Health Management (HM) (Continued)

Revision 1.1

139

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Figure 36. Event Notiﬁcation for LPC

8.2.10 Enhanced Thermal Control (ETC)

The Enhanced Thermal Control function generates an internal ETC signal for the Glue module. The assertion edge of this

signal turns off the Main power supply (VDD3) via the PS_ON pin.

The ETC function is controlled by the following events:

• The temperature data value in Temperature Zone1 is higher than the critical limit set in the Temperature Critical Limit

Zone1 register.

• A communication error with Device 1 (LM96011 or LM96010 or LM96012) occurs.

• A major SensorPath Bus failure is detected.

An asserted ETC signal turns off the Main power supply. The resulting ETC signal is deasserted when the VDD3 power

is off and remains deasserted until both of the following conditions are met:

• The delay time (182 ms) for enabling VDD channels (see Section 8.5.55 on page 177) after the VDD3 power is turned

on has elapsed.

• The temperature data in Temperature Zone1 was updated with a new value by the LMxx Sensor device

If the temperature data from Device 1 (LM96011 or LM96010 or LM96012) is not updated for 728 ms after VDD3 power is on (see

“Time-Out Function” on page 133), the HM assumes a communication error with the LMxx Sensor device occurred and asserts

ETC.

The ETC is enabled by the ETC_EN bit in the Enhanced Thermal Control Register (see Section 8.5.59 on page 179).

8.2.11 General Configuration

The Configuration register (see Section 8.5.22 on page 163) contains control bits for several general configuration options:

• Disable SMBus write access to the HM registers (SMBR bit).

• Override fan control setting and set all FANPWM outputs to the value contained in the associated FANPWMn MAX

Duty registers (OVRID bit).

• Lock some of the conﬁguration registers (LOCK bit).

• Start command for the monitoring functions and FANPWM control functions (START).

Event

Change

Detector

Interrupt

Enable

Internal

Bus

Write 1 to Clear

Status

R/W

Reset

Set

Read

Event

(_EV)

Status

R/W

Sensor

(_STS)

State

HMINT_STS1-3 Registers

HMSENS_STS1-3 Registers

(_EN)

SMI/SCI

Enable

R/W

(_EN)

HMINT_EN1-3 Registers

HMS_EN1-3 Registers

From Other

Enabled Events

Limit Events

From Other Enabled

SIOPME

SMI

LIMIT_EV

_2SMI/SCI

R/W

SMI/SCI_ROUT Register

State

Events

Critical

IRQ

to SCI

Events

Critical

to SMI

Events

Limit

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