SLUSE81E August 2020 – November 2023 BQ79612-Q1 , BQ79614-Q1 , BQ79616-Q1 , BQ79616H-Q1
PRODUCTION DATA
The tones are enabled by setting DEV_CONF[HB_EN] = 1 and DEV_CONF[FTONE_EN] = 1 to enable the Heartbeat and Fault Tone transmitters, respectively. The Heartbeat and Fault Tone receivers are always on in SLEEP mode regardless of the [HB_EN] and [FTONE_EN] settings. To avoid fault detection (asserting NFAULT or FAULT_SUMMARY register) by Heartbeat or Fault Tone fault, mask the fault by [MSK_COMM3_HB] = 1 or [MSK_COMM3_FTONE] = 1.
The Heartbeat and Fault Tone are formed with couplets with “–“ polarity. They are differentiated by the number of couplets. Unlike communication tones, Heartbeat and Fault Tone are transmitted periodically. The period between tones is referring as Burst period. The number of couplets transmitted is always greater than the number of couplets needed for detection.