MM912F634CV2AP datasheet(79/335 Pages) FREESCALE

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Functional Description and Application Information

Hall Sensor Supply Output - HSUP

MM912F634

Freescale Semiconductor

4.10

Hall Sensor Supply Output - HSUP

To supply Hall Effect Sensors or similar external loads, the HSUP output is implemented. To reduce power dissipation inside the

device, the output is implemented as a switchable Voltage Regulator, internally connected to the VS1 supply input. For protection,

an Over-temperature Shutdown and a Current Limitation is implemented. A write to the Hall Supply Register (HSR), when the

over-temperature condition is gone, will re-enable the Hall Supply Output.

The HSUP output is active only during Normal mode. A capacitor CHSUP is recommended for operation.

4.10.1

4.10.1.1

Hall Supply Register (HSR)

Table 95. Hall Supply Register (HSR)

Offset(73) 0x38

Access: User read/write

543

210

HOTIE

HOTC

HSUPON

Reset

000

Note:

73. Offset related to 0x0200 for blocking access and 0x300 for non blocking access within the global address space.

Table 96. HSR - Register Field Descriptions

Field

Description

7 - HOTIE

Hall Supply Over-temperature Interrupt Enable

6 - HOTC

Hall Supply Over-temperature Condition present. During the event, the Hall Supply is shut down. Reading the register will

clear the HOT flag if present. See Section 4.6, “Interrupts" for details.

0 - HSUPON

Hall Supply On:

0 - Hall Supply Regulator disabled

1 - Hall Supply Regulator enabled

MM912F634CV2AP Datasheet(PDF) 79 Page - Freescale Semiconductor, Inc