ZIOL2201 datasheet(26/92 Pages) RENESAS

26 / 92 page

ZIOL2xxx Datasheet

April 26, 2016

Figure 3.8

The Basic Scheme of the IC Self Protection

Channel

Driver

unlocked

Over-load /

Over-temp

Reg[20]

Peak Counter

Reg[21:25]

Overload

Counter

Stored

Exception

Reg[18]

INT_L

Lock Reset

(lock counter

elapsed)

Lock time

Assert time

Exception

(state signal)

Reg[20]

By „Read & Clear“ reset of

- Stored-Exception and

- Peak counter

Assert time expired,

exception causes

INT_L = 0 (if configured)

unlocked

locked (high-z)

monitored physical value exceeds the configured limit

overload counter

equals configured limit

time

INT_L follows

state signals

INT_L follows

stored exceptions

Any internal exception will be stored in status register[18]. This status register will be cleared by reading the

still present.

A lock can be reset by using the build-in and configurable lock counter (defined in the associated configuration

registers). As shown in Figure 3.8 the lock reset will be performed when the lock time has been elapsed. The lock

counter is using the same clock as the associated overload counter(s). Alternatively a lock can be reset by

performing an write access to status register[16] (for more details refer to Appendix A).

Depending on the IC configuration the any exception or stored exception can cause the INT_L pin to logic low. As

shown in Figure 3.8 INT_L can follow the state signals (internal exceptions) or the stored exception which is also

depending on the IC configuration.

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