Datasheet

TPS65910 , TPS65910A , TPS65910A3 , TPS659101
TPS659102 , TPS659103 , TPS659104 , TPS659105
TPS659106, TPS659107, TPS659108, TPS659109
SWCS046U –MARCH 2010–REVISED JUNE 2014 www.ti.com
6.7 Backup Registers
As part of the RTC the device contains five 8-bit registers which can be used for storage by the application
firmware when the external host is powered down. These registers retain their content as long as the
VRTC is active.
6.8 I
2
C Interface
A general-purpose serial control interface (CTL-I
2
C) allows read and write access to the configuration
registers of all resources of the system.
A second serial control interface (SR-I
2
C) is dedicated to SmartReflex applications such as DVFS or AVS.
Both control interfaces are compliant with HS-I
2
C specification.
These interfaces support the standard slave mode (100 Kbps), Fast mode (400 Kbps), and high-speed
mode (3.4 Mbps). The general-purpose I
2
C module using one slave hard-coded address (ID1 = 2Dh). The
SmartReflex I
2
C module uses one slave hard-coded address (ID0 = 12h). The master mode is not
supported.
Addressing: Seven-bit mode addressing device
They do not support the following features:
• 10-bit addressing
• General call
6.9 Thermal Monitoring and Shutdown
A thermal protection module monitors the junction temperature of the device versus two thresholds:
• Hot-die temperature threshold
• Thermal shutdown temperature threshold
When the hot-die temperature threshold is reached an interrupt is sent to software to close the noncritical
running tasks.
When the thermal shutdown temperature threshold is reached, the TPS65910 device is set under reset
and a transition to OFF state is initiated. Then the power-on enable conditions of the device is not
considered until the die temperature has decreased below the hot-die threshold. An hysteresis is applied
to the hot-die and shutdown threshold, when detecting a falling edge of temperature, and both detection
are debounced to avoid any parasitic detection. The TPS65910 device allows programming of four hot-die
temperature thresholds to increase the flexibility of the system.
By default, the thermal protection is enabled in ACTIVE state, but can be disabled through programming
register THERM_REG. The thermal protection can be enabled in SLEEP state programming register
SLEEP_KEEP_RES_ON. The thermal protection is automatically enabled during an OFF-to-ACTIVE state
transition and is kept enabled in OFF state after a switch-off sequence caused by a thermal shutdown
event. Transition to OFF state sequence caused by a thermal shutdown event is highlighted in the
INT_STS_REG status register. Recovery from this OFF state is initiated (switch-on sequence) when the
die temperature falls below the hot-die temperature threshold.
Hot-die and thermal shutdown temperature threshold detections state can be monitored or masked by
reading or programming the THERM_REG register. Hot-die interrupt can be masked by programming the
INT_MSK_REG register.
56 Detailed Description Copyright © 2010–2014, Texas Instruments Incorporated
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TPS659105 TPS659106 TPS659107 TPS659108 TPS659109