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AUX – Sensor Controller Registers

17.8.6.9 AUTOTAKE Register (Offset = 20h) [reset = X]

AUTOTAKE is shown in Figure 17-64 and described in Table 17-87.

Sticky Request For Single Semaphore

Figure 17-64. AUTOTAKE Register

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

RESERVED

R-X

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

RESERVED SMPH_ID

R-X R/W-X

Table 17-87. AUTOTAKE Register Field Descriptions

Bit Field Type Reset Description

31-3 RESERVED R X

Software should not rely on the value of a reserved. Writing any

other value than the reset value may result in undefined behavior.

2-0 SMPH_ID R/W X

Requesting a certain semaphore is done by writing the

corresponding semaphore ID, 0x0-0x7, to SMPH_ID. The request is

sticky and once the semaphore becomes available it will be taken. At

the same time, SMPH_AUTOTAKE_DONE event is asserted. This

event is deasserted when SW releases the semaphore or a new ID

is written to SMPH_ID. Note: SW must wait until

SMPH_AUTOTAKE_DONE event is triggered before writing a new

ID to SMPH_ID . Failing to do so might lead to permanently lost

semaphores as the owners may be unknown

1291

SWCU117A–February 2015–Revised March 2015 AUX – Sensor Controller with Digital and Analog Peripherals

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