DB3264 Rev 3

19/24

L99UDL01

Device description

22

2.6.4

Enable-able Weak Pull-up/down currents

The weak pull-up/pull-down currents are enable-able through SPI command (register 07H).

Each output can have enabled a weak pull up current or a weak pull down current

individually.

Activating a weak pull-up on one of a paralleled output and a weak pull-down in another of

the same parallel group will be ignored and set a WRT_fail bit. Alternatively, activating a

weak pull-up and a weak pull-down on the same output will be ignored and set a WRT_fail

bit.

Weak pull-up/pull-down currents are available for both the integrated and the external Half-

bridge controllers. This allows the user to determine if there is a short to ground or supply

condition on these outputs prior to actuate.

2.6.5

Dynamic output state detection

All outputs, internal and external have the ability to detect if the output voltage is above or

threshold the corresponding bit in Diagnostic register 11H is set high. If the output voltage is

below the threshold then the corresponding bit is set low.