SPEAR1340 datasheet(37/200 Pages) STMICROELECTRONICS

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SPEAr1340

Device functions

Doc ID 023063 Rev 4

37/200

2.36

Power control module (PCM)

PCM is the core of the SPEAr1340 leakage power management system. Its role is to

properly manage the power supply shutoff of the switchable sections of the embedded MPU.

Main features:

●

Generation of supply switch control signals for SPEAr1340 power islands

●

Generation of isolation control signals for SPEAr1340 power islands

●

Generation of shutoff commands for external DDR 1V2 and 1V5/1V8 supply lines

●

Acknowledge generation for user requested power island configuration

●

Monitoring of voltage detector outputs for each power island

●

Wake-up source management

2.37

Temperature sensor (THSENS)

The THSENS block is an embedded sensor for junction temperature monitoring.

Main features:

●

Embeds a thermal sensor providing digital measurement of junction temperature

●

Generates a “high-temperature” interrupt when junction temperature exceeds a

software programmable higher bound threshold

●

Generates a “low-temperature” interrupt when junction temperature is lower than a

software programmable lower bound threshold

●

Supports operating conditions ranging from –40 to 125

°C

●

Allows measurement of junction temperature starting at 20

°C

●

Allows offset correction of digital measurement (typical correction value 10)

●

Software programmable power-down functionality for lower power consumption

●

Continuous (periodic) sensing of temperature when not powered down

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