TLE9012DQU datasheet(21/76 Pages) INFINEON

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Sensing IC

Sleep mode

GPIO1/

UART_HS

GPIO0/

UART_LS

IFL_L

IFL_H

IFH_L

IFH_H

Sensing IC

RX – RX

Direction set

TX - TX

Direction set

GPIO1/

UART_HS

GPIO0/

UART_LS

IFL_L

IFL_H

IFH_L

IFH_H

Primary on Top

Sensing IC

Sleep mode

GPIO1/

UART_HS

GPIO0/

UART_LS

IFL_L

IFL_H

IFH_L

IFH_H

Sensing IC

TX - TX

Dircetion set

RX – RX

Direction set

GPIO1/

UART_HS

GPIO0/

UART_LS

IFL_L

IFL_H

IFH_L

IFH_H

Primary on Bottom

Sensing IC

Sleep mode

IFL_L

IFL_H

Sensing IC

RX - TX

Direction set IFL_L

IFL_H

Primary on Top

Sensing IC

Sleep mode IFH_L

IFH_H

Sensing IC

RX – TX

Direction set IFH_L

IFH_H

Primary on Bottom

(1)

(2)

(3)

(4)

IFH_L

RX IFH_H

IFH_L

RX IFH_H

IFL_L

IFL_H

IFL_L

IFL_H

(5)

(6)

(7)

(8)

Figure 5

Wake-up signal propagation

The device configures the communication interface automatically after wake-up.

The device configures the iso UART interface of the wake-up signal received as RX during idle mode (no

communication) until the next wake-up. The device configures the other iso UART interface as TX in idle mode

until the next wake-up.

The IC has a 7-bit watchdog counter which is counting downwards. The watchdog counter must be serviced via

an UART or iso UART command before it reaches 0. Otherwise the device enters sleep mode. The watchdog

counter can be set to maximum tWD_max with a resolution of tWD_LSB, via the watchdog counter register.

Note: After the IC wake-up, the watchdog counter is set to its maximum value tWD_max

If a longer counter interval is needed, the IC can be put into an extended watchdog mode by setting the

operation mode register. In this mode the maximum time until the watchdog counter expires is defined by

tWD_EXT_max with a resolution of tWD_EXT_LSB. When the counter expires, the device enters sleep mode.

The device provides a free-running 9-bit main counter which is counting upwards and can be checked via the

communication interface reading the watchdog counter register.

The maximum length is tCount_max with a resolution of tCount_LSB. The precisely timed reading of the main

counter gives an indication of the main oscillator speed.

If bitfield RR_CONFIG.RR_SYNC is set, then a WDOG_CNT write command resets the main counter. This prepares

for a broadcast read of all main counters.

After the device wakes up on a standard wake-up signal the device's node ID is set to 0 by default. In this state,

the device does not forward any communication. A node ID other than 0 must be set in the address (ID) bits of

configuration register before the watchdog timer expires. Only then the device forwards communication.

Note: If an EMM signal is received, the device forwards it even though the device is not enumerated.

TLE9012DQU

Li-ion battery monitoring and balancing IC

6 Watchdog and wake-up function (WD)

Datasheet

Rev. 1.0

2022-01-24

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