Tamper options#

Tamper configuration options.

Levels, signals and filter options.

Macros#

#define
SL_SE_TAMPER_LEVEL_IGNORE 0

No action taken.

#define
SL_SE_TAMPER_LEVEL_INTERRUPT 1

Generate interrupt.

#define
SL_SE_TAMPER_LEVEL_FILTER 2

Increment filter counter.

#define
SL_SE_TAMPER_LEVEL_RESET 4

System reset.

#define
SL_SE_TAMPER_LEVEL_PERMANENTLY_ERASE_OTP 7

Erase OTP - THIS WILL MAKE THE DEVICE INOPERATIONAL!

#define
SL_SE_TAMPER_SIGNAL_RESERVED_1 0x0

Reserved tamper signal.

#define
SL_SE_TAMPER_SIGNAL_FILTER_COUNTER 0x1

Filter counter exceeds threshold.

#define
SL_SE_TAMPER_SIGNAL_WATCHDOG 0x2

SE watchdog timeout.

#define
SL_SE_TAMPER_SIGNAL_CRYPTO_ERROR 0x3

Crypto error detected.

#define
SL_SE_TAMPER_SIGNAL_SE_RAM_ECC_2 0x4

SE RAM 2-bit ECC error.

#define
SL_SE_TAMPER_SIGNAL_RESERVED_2 0x5

Reserved tamper signal.

#define
SL_SE_TAMPER_SIGNAL_SE_MAJOR_FAULT 0x6

SE major fault detected.

#define
SL_SE_TAMPER_SIGNAL_L2ICACHE 0x7

L2 instruction cache error.

#define
SL_SE_TAMPER_SIGNAL_RESERVED_3 0x8

Reserved tamper signal.

#define
SL_SE_TAMPER_SIGNAL_USER_SECURE_BOOT_FAILED 0x9

Secure boot of user code failed.

#define
SL_SE_TAMPER_SIGNAL_MAILBOX_AUTHORIZATION_ERROR 0xA

Unauthorised command received over the Mailbox interface.

#define
SL_SE_TAMPER_SIGNAL_DCI_AUTHORIZATION_ERROR 0xB

Unauthorised command received over the DCI interface.

#define
SL_SE_TAMPER_SIGNAL_SE_SOFTWARE_ASSERTION 0xC

SE software triggers an assert.

#define
SL_SE_TAMPER_SIGNAL_RESERVED_4 0xD

Reserved tamper signal.

#define
SL_SE_TAMPER_SIGNAL_SELFTEST_FAILED 0xE

Integrity error of internal storage is detected.

#define
SL_SE_TAMPER_SIGNAL_TRNG_MONITOR 0xF

TRNG monitor detected lack of entropy.

#define
SL_SE_TAMPER_SIGNAL_SECURE_LOCK_ERROR 0x10

Debug lock internal logic check failed.

#define
SL_SE_TAMPER_ATAMPDET 0x11

Any tamper detection.

#define
SL_SE_TAMPER_SIGNAL_OTP_ALARM 0x12

OTP alarm triggered.

#define
SL_SE_TAMPER_SE_ICACHE_ERROR 0x13

SE ICache RAM error.

#define
SL_SE_TAMPER_SIGNAL_SE_RAM_ECC_1 0x14

SE RAM 1-bit ECC error.

#define
SL_SE_TAMPER_SIGNAL_BOD 0x15

Brown-out-detector threshold alert.

#define
SL_SE_TAMPER_SIGNAL_TEMPERATURE_SENSOR 0x16

On-device temperature sensor.

#define
SL_SE_TAMPER_SIGNAL_DPLL_LOCK_FAIL 0x17

DPLL lock failure.

#define
SL_SE_TAMPER_SIGNAL_SOC_PLL_FAIL 0x18

SoC PLL failure.

#define
SL_SE_TAMPER_SIGNAL_ETAMPDET 0x19

External tamper detect.

#define
SL_SE_TAMPER_SIGNAL_KSU_ECC_1 0x1A

KSU ECC 1-bit error.

#define
SL_SE_TAMPER_SIGNAL_KSU_ECC_2 0x1B

KSU ECC 2-bit error.

#define
SL_SE_TAMPER_SIGNAL_QSPI_RESEED_ERR 0x1C

QSPI reseed error.

#define
SL_SE_TAMPER_SIGNAL_PRS0 0x1D

PRS channel 0 asserted.

#define
SL_SE_TAMPER_SIGNAL_PRS1 0x1E

PRS channel 1 asserted.

#define
SL_SE_TAMPER_SIGNAL_PRS2 0x1F

PRS channel 2 asserted.

#define
SL_SE_TAMPER_SIGNAL_NUM_SIGNALS 0x20

Number of tamper signals.

#define
SL_SE_TAMPER_FILTER_PERIOD_32MS 0x0

Timeout ~32ms.

#define
SL_SE_TAMPER_FILTER_PERIOD_64MS 0x1

Timeout ~64ms.

#define
SL_SE_TAMPER_FILTER_PERIOD_128MS 0x2

Timeout ~128ms.

#define
SL_SE_TAMPER_FILTER_PERIOD_256MS 0x3

Timeout ~256ms.

#define
SL_SE_TAMPER_FILTER_PERIOD_512MS 0x4

Timeout ~512ms.

#define
SL_SE_TAMPER_FILTER_PERIOD_1S 0x5

Timeout ~1s.

#define
SL_SE_TAMPER_FILTER_PERIOD_2S 0x6

Timeout ~2s.

#define
SL_SE_TAMPER_FILTER_PERIOD_4S 0x7

Timeout ~4.1s.

#define
SL_SE_TAMPER_FILTER_PERIOD_8S 0x8

Timeout ~8.2s.

#define
SL_SE_TAMPER_FILTER_PERIOD_16S 0x9

Timeout ~16.4s.

#define
SL_SE_TAMPER_FILTER_PERIOD_33S 0xA

Timeout ~32.8s.

#define
SL_SE_TAMPER_FILTER_PERIOD_1MIN 0xB

Timeout ~1.1min.

#define
SL_SE_TAMPER_FILTER_PERIOD_2MIN 0xC

Timeout ~2.2min.

#define
SL_SE_TAMPER_FILTER_PERIOD_4MIN 0xD

Timeout ~4.4min.

#define
SL_SE_TAMPER_FILTER_PERIOD_9MIN 0xE

Timeout ~8.7min.

#define
SL_SE_TAMPER_FILTER_PERIOD_18MIN 0xF

Timeout ~17.5min.

#define
SL_SE_TAMPER_FILTER_PERIOD_35MIN 0x10

Timeout ~35min.

#define
SL_SE_TAMPER_FILTER_PERIOD_1H 0x11

Timeout ~1.2h.

#define
SL_SE_TAMPER_FILTER_PERIOD_2H 0x12

Timeout ~2.3h.

#define
SL_SE_TAMPER_FILTER_PERIOD_5H 0x13

Timeout ~4.7h.

#define
SL_SE_TAMPER_FILTER_PERIOD_9H 0x14

Timeout ~9.3h.

#define
SL_SE_TAMPER_FILTER_PERIOD_19H 0x15

Timeout ~18.6h.

#define
SL_SE_TAMPER_FILTER_PERIOD_2DAYS 0x16

Timeout ~1.6days.

#define
SL_SE_TAMPER_FILTER_PERIOD_3DAYS 0x17

Timeout ~3.1days.

#define
SL_SE_TAMPER_FILTER_PERIOD_6DAYS 0x18

Timeout ~6.2days.

#define
SL_SE_TAMPER_FILTER_PERIOD_12DAYS 0x19

Timeout ~12.4days.

#define
SL_SE_TAMPER_FILTER_PERIOD_25DAYS 0x1A

Timeout ~24.9days.

#define
SL_SE_TAMPER_FILTER_PERIOD_50DAYS 0x1B

Timeout ~49.7days.

#define
SL_SE_TAMPER_FILTER_PERIOD_100DAYS 0x1C

Timeout ~99.4days.

#define
SL_SE_TAMPER_FILTER_PERIOD_199DAYS 0x1D

Timeout ~198.8days.

#define
SL_SE_TAMPER_FILTER_PERIOD_398DAYS 0x1E

Timeout ~397.7days.

#define
SL_SE_TAMPER_FILTER_PERIOD_795DAYS 0x1F

Timeout ~795.4days.

#define
SL_SE_TAMPER_FILTER_THRESHOLD_2 0x7

Counter threshold 2.

#define
SL_SE_TAMPER_FILTER_THRESHOLD_4 0x6

Counter threshold 4.

#define
SL_SE_TAMPER_FILTER_THRESHOLD_8 0x5

Counter threshold 8.

#define
SL_SE_TAMPER_FILTER_THRESHOLD_16 0x4

Counter threshold 16.

#define
SL_SE_TAMPER_FILTER_THRESHOLD_32 0x3

Counter threshold 32.

#define
SL_SE_TAMPER_FILTER_THRESHOLD_64 0x2

Counter threshold 64.

#define
SL_SE_TAMPER_FILTER_THRESHOLD_128 0x1

Counter threshold 128.

#define
SL_SE_TAMPER_FILTER_THRESHOLD_256 0x0

Counter threshold 256.

#define
SL_SE_TAMPER_FLAG_DGLITCH_ALWAYS_ON (1UL << 1)

Tamper flags.

#define
SL_SE_TAMPER_FLAG_KEEP_TAMPER_ALIVE_DURING_SLEEP (1UL << 2)

Tamper is kept alive during sleep (down to EM3)

Macro Definition Documentation#

SL_SE_TAMPER_LEVEL_IGNORE#

#define SL_SE_TAMPER_LEVEL_IGNORE
Value:
0

No action taken.


SL_SE_TAMPER_LEVEL_INTERRUPT#

#define SL_SE_TAMPER_LEVEL_INTERRUPT
Value:
1

Generate interrupt.


SL_SE_TAMPER_LEVEL_FILTER#

#define SL_SE_TAMPER_LEVEL_FILTER
Value:
2

Increment filter counter.


SL_SE_TAMPER_LEVEL_RESET#

#define SL_SE_TAMPER_LEVEL_RESET
Value:
4

System reset.


SL_SE_TAMPER_LEVEL_PERMANENTLY_ERASE_OTP#

#define SL_SE_TAMPER_LEVEL_PERMANENTLY_ERASE_OTP
Value:
7

Erase OTP - THIS WILL MAKE THE DEVICE INOPERATIONAL!


SL_SE_TAMPER_SIGNAL_RESERVED_1#

#define SL_SE_TAMPER_SIGNAL_RESERVED_1
Value:
0x0

Reserved tamper signal.


SL_SE_TAMPER_SIGNAL_FILTER_COUNTER#

#define SL_SE_TAMPER_SIGNAL_FILTER_COUNTER
Value:
0x1

Filter counter exceeds threshold.


SL_SE_TAMPER_SIGNAL_WATCHDOG#

#define SL_SE_TAMPER_SIGNAL_WATCHDOG
Value:
0x2

SE watchdog timeout.


SL_SE_TAMPER_SIGNAL_CRYPTO_ERROR#

#define SL_SE_TAMPER_SIGNAL_CRYPTO_ERROR
Value:
0x3

Crypto error detected.


SL_SE_TAMPER_SIGNAL_SE_RAM_ECC_2#

#define SL_SE_TAMPER_SIGNAL_SE_RAM_ECC_2
Value:
0x4

SE RAM 2-bit ECC error.


SL_SE_TAMPER_SIGNAL_RESERVED_2#

#define SL_SE_TAMPER_SIGNAL_RESERVED_2
Value:
0x5

Reserved tamper signal.


SL_SE_TAMPER_SIGNAL_SE_MAJOR_FAULT#

#define SL_SE_TAMPER_SIGNAL_SE_MAJOR_FAULT
Value:
0x6

SE major fault detected.


SL_SE_TAMPER_SIGNAL_L2ICACHE#

#define SL_SE_TAMPER_SIGNAL_L2ICACHE
Value:
0x7

L2 instruction cache error.


SL_SE_TAMPER_SIGNAL_RESERVED_3#

#define SL_SE_TAMPER_SIGNAL_RESERVED_3
Value:
0x8

Reserved tamper signal.


SL_SE_TAMPER_SIGNAL_USER_SECURE_BOOT_FAILED#

#define SL_SE_TAMPER_SIGNAL_USER_SECURE_BOOT_FAILED
Value:
0x9

Secure boot of user code failed.


SL_SE_TAMPER_SIGNAL_MAILBOX_AUTHORIZATION_ERROR#

#define SL_SE_TAMPER_SIGNAL_MAILBOX_AUTHORIZATION_ERROR
Value:
0xA

Unauthorised command received over the Mailbox interface.


SL_SE_TAMPER_SIGNAL_DCI_AUTHORIZATION_ERROR#

#define SL_SE_TAMPER_SIGNAL_DCI_AUTHORIZATION_ERROR
Value:
0xB

Unauthorised command received over the DCI interface.


SL_SE_TAMPER_SIGNAL_SE_SOFTWARE_ASSERTION#

#define SL_SE_TAMPER_SIGNAL_SE_SOFTWARE_ASSERTION
Value:
0xC

SE software triggers an assert.


SL_SE_TAMPER_SIGNAL_RESERVED_4#

#define SL_SE_TAMPER_SIGNAL_RESERVED_4
Value:
0xD

Reserved tamper signal.


SL_SE_TAMPER_SIGNAL_SELFTEST_FAILED#

#define SL_SE_TAMPER_SIGNAL_SELFTEST_FAILED
Value:
0xE

Integrity error of internal storage is detected.


SL_SE_TAMPER_SIGNAL_TRNG_MONITOR#

#define SL_SE_TAMPER_SIGNAL_TRNG_MONITOR
Value:
0xF

TRNG monitor detected lack of entropy.


SL_SE_TAMPER_SIGNAL_SECURE_LOCK_ERROR#

#define SL_SE_TAMPER_SIGNAL_SECURE_LOCK_ERROR
Value:
0x10

Debug lock internal logic check failed.


SL_SE_TAMPER_ATAMPDET#

#define SL_SE_TAMPER_ATAMPDET
Value:
0x11

Any tamper detection.


SL_SE_TAMPER_SIGNAL_OTP_ALARM#

#define SL_SE_TAMPER_SIGNAL_OTP_ALARM
Value:
0x12

OTP alarm triggered.


SL_SE_TAMPER_SE_ICACHE_ERROR#

#define SL_SE_TAMPER_SE_ICACHE_ERROR
Value:
0x13

SE ICache RAM error.


SL_SE_TAMPER_SIGNAL_SE_RAM_ECC_1#

#define SL_SE_TAMPER_SIGNAL_SE_RAM_ECC_1
Value:
0x14

SE RAM 1-bit ECC error.


SL_SE_TAMPER_SIGNAL_BOD#

#define SL_SE_TAMPER_SIGNAL_BOD
Value:
0x15

Brown-out-detector threshold alert.


SL_SE_TAMPER_SIGNAL_TEMPERATURE_SENSOR#

#define SL_SE_TAMPER_SIGNAL_TEMPERATURE_SENSOR
Value:
0x16

On-device temperature sensor.


SL_SE_TAMPER_SIGNAL_DPLL_LOCK_FAIL#

#define SL_SE_TAMPER_SIGNAL_DPLL_LOCK_FAIL
Value:
0x17

DPLL lock failure.


SL_SE_TAMPER_SIGNAL_SOC_PLL_FAIL#

#define SL_SE_TAMPER_SIGNAL_SOC_PLL_FAIL
Value:
0x18

SoC PLL failure.


SL_SE_TAMPER_SIGNAL_ETAMPDET#

#define SL_SE_TAMPER_SIGNAL_ETAMPDET
Value:
0x19

External tamper detect.


SL_SE_TAMPER_SIGNAL_KSU_ECC_1#

#define SL_SE_TAMPER_SIGNAL_KSU_ECC_1
Value:
0x1A

KSU ECC 1-bit error.


SL_SE_TAMPER_SIGNAL_KSU_ECC_2#

#define SL_SE_TAMPER_SIGNAL_KSU_ECC_2
Value:
0x1B

KSU ECC 2-bit error.


SL_SE_TAMPER_SIGNAL_QSPI_RESEED_ERR#

#define SL_SE_TAMPER_SIGNAL_QSPI_RESEED_ERR
Value:
0x1C

QSPI reseed error.


SL_SE_TAMPER_SIGNAL_PRS0#

#define SL_SE_TAMPER_SIGNAL_PRS0
Value:
0x1D

PRS channel 0 asserted.


SL_SE_TAMPER_SIGNAL_PRS1#

#define SL_SE_TAMPER_SIGNAL_PRS1
Value:
0x1E

PRS channel 1 asserted.


SL_SE_TAMPER_SIGNAL_PRS2#

#define SL_SE_TAMPER_SIGNAL_PRS2
Value:
0x1F

PRS channel 2 asserted.


SL_SE_TAMPER_SIGNAL_NUM_SIGNALS#

#define SL_SE_TAMPER_SIGNAL_NUM_SIGNALS
Value:
0x20

Number of tamper signals.


SL_SE_TAMPER_FILTER_PERIOD_32MS#

#define SL_SE_TAMPER_FILTER_PERIOD_32MS
Value:
0x0

Timeout ~32ms.


SL_SE_TAMPER_FILTER_PERIOD_64MS#

#define SL_SE_TAMPER_FILTER_PERIOD_64MS
Value:
0x1

Timeout ~64ms.


SL_SE_TAMPER_FILTER_PERIOD_128MS#

#define SL_SE_TAMPER_FILTER_PERIOD_128MS
Value:
0x2

Timeout ~128ms.


SL_SE_TAMPER_FILTER_PERIOD_256MS#

#define SL_SE_TAMPER_FILTER_PERIOD_256MS
Value:
0x3

Timeout ~256ms.


SL_SE_TAMPER_FILTER_PERIOD_512MS#

#define SL_SE_TAMPER_FILTER_PERIOD_512MS
Value:
0x4

Timeout ~512ms.


SL_SE_TAMPER_FILTER_PERIOD_1S#

#define SL_SE_TAMPER_FILTER_PERIOD_1S
Value:
0x5

Timeout ~1s.


SL_SE_TAMPER_FILTER_PERIOD_2S#

#define SL_SE_TAMPER_FILTER_PERIOD_2S
Value:
0x6

Timeout ~2s.


SL_SE_TAMPER_FILTER_PERIOD_4S#

#define SL_SE_TAMPER_FILTER_PERIOD_4S
Value:
0x7

Timeout ~4.1s.


SL_SE_TAMPER_FILTER_PERIOD_8S#

#define SL_SE_TAMPER_FILTER_PERIOD_8S
Value:
0x8

Timeout ~8.2s.


SL_SE_TAMPER_FILTER_PERIOD_16S#

#define SL_SE_TAMPER_FILTER_PERIOD_16S
Value:
0x9

Timeout ~16.4s.


SL_SE_TAMPER_FILTER_PERIOD_33S#

#define SL_SE_TAMPER_FILTER_PERIOD_33S
Value:
0xA

Timeout ~32.8s.


SL_SE_TAMPER_FILTER_PERIOD_1MIN#

#define SL_SE_TAMPER_FILTER_PERIOD_1MIN
Value:
0xB

Timeout ~1.1min.


SL_SE_TAMPER_FILTER_PERIOD_2MIN#

#define SL_SE_TAMPER_FILTER_PERIOD_2MIN
Value:
0xC

Timeout ~2.2min.


SL_SE_TAMPER_FILTER_PERIOD_4MIN#

#define SL_SE_TAMPER_FILTER_PERIOD_4MIN
Value:
0xD

Timeout ~4.4min.


SL_SE_TAMPER_FILTER_PERIOD_9MIN#

#define SL_SE_TAMPER_FILTER_PERIOD_9MIN
Value:
0xE

Timeout ~8.7min.


SL_SE_TAMPER_FILTER_PERIOD_18MIN#

#define SL_SE_TAMPER_FILTER_PERIOD_18MIN
Value:
0xF

Timeout ~17.5min.


SL_SE_TAMPER_FILTER_PERIOD_35MIN#

#define SL_SE_TAMPER_FILTER_PERIOD_35MIN
Value:
0x10

Timeout ~35min.


SL_SE_TAMPER_FILTER_PERIOD_1H#

#define SL_SE_TAMPER_FILTER_PERIOD_1H
Value:
0x11

Timeout ~1.2h.


SL_SE_TAMPER_FILTER_PERIOD_2H#

#define SL_SE_TAMPER_FILTER_PERIOD_2H
Value:
0x12

Timeout ~2.3h.


SL_SE_TAMPER_FILTER_PERIOD_5H#

#define SL_SE_TAMPER_FILTER_PERIOD_5H
Value:
0x13

Timeout ~4.7h.


SL_SE_TAMPER_FILTER_PERIOD_9H#

#define SL_SE_TAMPER_FILTER_PERIOD_9H
Value:
0x14

Timeout ~9.3h.


SL_SE_TAMPER_FILTER_PERIOD_19H#

#define SL_SE_TAMPER_FILTER_PERIOD_19H
Value:
0x15

Timeout ~18.6h.


SL_SE_TAMPER_FILTER_PERIOD_2DAYS#

#define SL_SE_TAMPER_FILTER_PERIOD_2DAYS
Value:
0x16

Timeout ~1.6days.


SL_SE_TAMPER_FILTER_PERIOD_3DAYS#

#define SL_SE_TAMPER_FILTER_PERIOD_3DAYS
Value:
0x17

Timeout ~3.1days.


SL_SE_TAMPER_FILTER_PERIOD_6DAYS#

#define SL_SE_TAMPER_FILTER_PERIOD_6DAYS
Value:
0x18

Timeout ~6.2days.


SL_SE_TAMPER_FILTER_PERIOD_12DAYS#

#define SL_SE_TAMPER_FILTER_PERIOD_12DAYS
Value:
0x19

Timeout ~12.4days.


SL_SE_TAMPER_FILTER_PERIOD_25DAYS#

#define SL_SE_TAMPER_FILTER_PERIOD_25DAYS
Value:
0x1A

Timeout ~24.9days.


SL_SE_TAMPER_FILTER_PERIOD_50DAYS#

#define SL_SE_TAMPER_FILTER_PERIOD_50DAYS
Value:
0x1B

Timeout ~49.7days.


SL_SE_TAMPER_FILTER_PERIOD_100DAYS#

#define SL_SE_TAMPER_FILTER_PERIOD_100DAYS
Value:
0x1C

Timeout ~99.4days.


SL_SE_TAMPER_FILTER_PERIOD_199DAYS#

#define SL_SE_TAMPER_FILTER_PERIOD_199DAYS
Value:
0x1D

Timeout ~198.8days.


SL_SE_TAMPER_FILTER_PERIOD_398DAYS#

#define SL_SE_TAMPER_FILTER_PERIOD_398DAYS
Value:
0x1E

Timeout ~397.7days.


SL_SE_TAMPER_FILTER_PERIOD_795DAYS#

#define SL_SE_TAMPER_FILTER_PERIOD_795DAYS
Value:
0x1F

Timeout ~795.4days.


SL_SE_TAMPER_FILTER_THRESHOLD_2#

#define SL_SE_TAMPER_FILTER_THRESHOLD_2
Value:
0x7

Counter threshold 2.


SL_SE_TAMPER_FILTER_THRESHOLD_4#

#define SL_SE_TAMPER_FILTER_THRESHOLD_4
Value:
0x6

Counter threshold 4.


SL_SE_TAMPER_FILTER_THRESHOLD_8#

#define SL_SE_TAMPER_FILTER_THRESHOLD_8
Value:
0x5

Counter threshold 8.


SL_SE_TAMPER_FILTER_THRESHOLD_16#

#define SL_SE_TAMPER_FILTER_THRESHOLD_16
Value:
0x4

Counter threshold 16.


SL_SE_TAMPER_FILTER_THRESHOLD_32#

#define SL_SE_TAMPER_FILTER_THRESHOLD_32
Value:
0x3

Counter threshold 32.


SL_SE_TAMPER_FILTER_THRESHOLD_64#

#define SL_SE_TAMPER_FILTER_THRESHOLD_64
Value:
0x2

Counter threshold 64.


SL_SE_TAMPER_FILTER_THRESHOLD_128#

#define SL_SE_TAMPER_FILTER_THRESHOLD_128
Value:
0x1

Counter threshold 128.


SL_SE_TAMPER_FILTER_THRESHOLD_256#

#define SL_SE_TAMPER_FILTER_THRESHOLD_256
Value:
0x0

Counter threshold 256.


SL_SE_TAMPER_FLAG_DGLITCH_ALWAYS_ON#

#define SL_SE_TAMPER_FLAG_DGLITCH_ALWAYS_ON
Value:
(1UL << 1)

Tamper flags.

Digital glitch detector always on


SL_SE_TAMPER_FLAG_KEEP_TAMPER_ALIVE_DURING_SLEEP#

#define SL_SE_TAMPER_FLAG_KEEP_TAMPER_ALIVE_DURING_SLEEP
Value:
(1UL << 2)

Tamper is kept alive during sleep (down to EM3)