TPS929160-Q1
ZHCSNG0 – APRIL 2023
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7.4 Device Functional Modes
POR
POR State
(POR)
EN = Logic High
VBAT Good and
LDO Good
Initialization State
(INIT)
Configurable Init Delay
INITTIMER
0h: 0ms 8h: 200us
1h: 50ms 9h: 100us
2h: 20ms Ah: 50us
3h: 10ms Bh: 50us
4h: 5ms
5h: 2ms
6h: 1ms
Ch: 50us
Dh: 50us
Eh: 50us
WDTimer overflows or
FORCEFS = 1
7h: 500us Fh: 50us
Normal State
(NORMAL)
Fail-Safe State
(FAILSAFE)
Clear Fail-safe
CLRFS = 1
Channel Directly
Controlled by FS0 or FS1
pins
EEPROM Program Sequence:
Write serial code to EEPGATE
EEPMODE = 1
EEPMODE = 0
WDTimer
WDTIMER
0h: Disable 8h: 50ms
Program State
(PROG)
1h: 200us
2h: 500us
3h: 1ms
9h: 100ms
Ah: 200ms
Bh: 500ms
4h: 2ms
5h: 5ms
6h: 10ms
7h: 20ms
Ch: Direct to FS
Dh: Direct to FS
Eh: Direct to FS
Fh: Direct to FS
Functional states
图 7-11. Device Functional Mode Statemachine
7.4.1 POR State
Upon power up, the TPS929160-Q1 enters POWER_ON_RESET (POR) state. In this state, registers are
cleared to default value, outputs are disabled, and the device cannot be accessed through the FlexWire
interface.
After both the VBAT input and the LDO output are above their UVLO threshold, the device switches to
INITIALIZATION state (INIT). If any of the supply fails below UVLO threshold or EN pin is pulled low in other
states, the device immediately switches to POR state.
7.4.2 INITIALIZATION state
The INITIALIZATION state is designed to allow master controller to have enough time to power up before the
device automatically gets into FAIL-SAFE states. INIT mode has a configurable delay programmed by 4-bit
register INITTIMER. After the delay counter is reached, the device changes to NORMAL state. In INIT state,
the communication between master controller and the TPS929160-Q1 is enabled through FlexWire interface.
In INITIALIZATION state, device automatically load register map default values, which can be programmed
in corresponding EEPROM. The master controller sets CLRPOR to 1 in INITIALIZATION state, the device
immediately switches to NORMAL state. Only write CLRPOR to TPS929160-Q1 in INITIALIZATION state.
7.4.3 NORMAL state
After the TPS929160-Q1 is in NORMAL state, the device operates under master control for LED animation
and diagnostics using a FlexWire interface. The TPS929160-Q1 integrates a watchdog timer to monitor the
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Product Folder Links: TPS929160-Q1
English Data Sheet: SLVSG60
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