L9965TS datasheet(18/62 Pages) STMICROELECTRONICS

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1. NVM trimming data CRC

2. NVM configuration data CRC

3. Oscillator fail

4. Oscillator stuck: if detected, logic block is immediately put under reset and the device moves to DEEPSLEEP

state (immediate reaction)

5. Oscillators Monitor BIST

6. V3V3 overvoltage

7. V5V overvoltage

8. V5V undervoltage

9. V5V overcurrent

10. GND loss (In CYCLIC_WAKEUP this diagnosis is executed automatically independently by the value of

GND_LOSS_ENABLE bit)

11. Analog BIST:

a. V3V3 overvoltage comparator analog BIST

b. V5V overvoltage comparator analog BIST

c. V5V undervoltage comparator analog BIST

d. GND loss comparator BIST

12. Thermal-shutdown monitoring.

If at least one of the above faults is verified, the device moves to NORMAL state and the fault detection is latched

in the corresponding bit of the status registers GEN_STATUS1 and GEN_STATUS3. Faults that may happen

within VIF tone generation time will not cause a transition to NORMAL state.

According to fault detection mask registers GEN_CFG2 and GEN_CFG3, fault detection is notified by the FLT pin

(asserted HIGH) and reported on the FAULT bit of the SPI MISO frame shown in Table 26. Depending on its

configuration (see Section 5.9.3), the WKP pin may also be asserted HIGH in case of faults. In this case, no

CYCLIC_WAKEUP tone is generated.

Assert condition and behavior of each fault are described in detail in the related section.

In addition to the above faults monitoring, a timeout counter (TCW_diag_timeout) is running in background during

diagnostic phase to monitor its duration.

Table 8. CYCLIC_WAKEUP timeout diagnostic

Fault type

Assertion condition

IC reaction to assertion

Release

condition

Maskable

CYCLIC_WAKEUP

Duration Timeout

Diagnostic time in

CYCLIC_WAKEUP

t > TCW_diag_timeout

•

Diagnostic routine is interrupted

•

Device moves to NORMAL

•

GEN_CFG5.WAKEUP_CYCLIC_END = 1

•

The FLT pin, the WKP pin and the SPI FAULT

are asserted

Clear on

read

Non

maskable

CYCLIC_WAKEUP

Tone not received in

TCYCLIC_WAKEUP_TIMEOUT

when transceiver is

listener

•

Device moves to NORMAL

•

GEN_CFG5.WAKEUP_CYCLIC_TRX_TIMEOUT

= 1

•

The FLT pin, the WKP pin and the SPI FAULT

are asserted

Clear on

read

Non

maskable

5.1.3

Electrical parameters

Table 9. FSM and Wakeup electrical parameters

Symbol

Parameter

Test conditions

Min

Typ

Max Unit

TFIRST_POWERUP

Time needed to perform

first power-up sequence

(to reach DEEP_SLEEP

state)

L9965T/L9965TS

Functional description

DS14987 - Rev 1

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