Datasheet
Table Of Contents
- Figure 1. EVAL6460 demonstration board
- 1 The L6460 main features
- 2 EVAL6460 board description
- 3 The EVAL6460 controlled by the EVAL_IBU-STR7
- Figure 5. EVAL_IBU-STR7 board
- Figure 6. EVAL_IBU-STR7 schematic board
- 3.1 Board connection and configuration
- 3.2 Starting flexSPIN evaluation software
- Figure 13. FlexSPIN evaluation software - start window
- 3.2.1 How to turn-on the VswDrv regulator
- 3.2.2 How to enable the DC1 and DC2 output bridges
- 3.2.3 How to enable the DC3 and DC4 output bridges
- 3.2.4 How to assign and read a GPIO
- 3.2.5 How to read and clear an undervoltage event
- 3.2.6 How to manage the interrupt controller
- 3.2.7 How to put the device into "low power" condition and awaken it
- 3.2.8 How to generate a PWM
- 3.2.9 How to close the low voltage power switch
- 3.2.10 How to measure an input voltage using A-D converter
- 3.2.11 How to use the digital comparator
- 3.2.12 How to configure and program the device via the SPI sequencer
- 3.2.13 How to read the device temperature
- 3.2.14 How to work in master - slave configuration
- 4 Revision history
AN3097 The EVAL6460 controlled by the EVAL_IBU-STR7
Doc ID 16599 Rev 2 25/34
3.2.5 How to read and clear an undervoltage event
The L6460 integrates an nRESET circuit that monitors V
Supply
, V
Supply_int
, V
Pump
, V
GPIO_SPI
and all system regulator voltages (V
System
). The purpose of this circuit is to prevent the
device functioning until the monitored voltages reach their operative value and do not fall
below their own undervoltage threshold.
In the first software window click the L6460 device and then the "Supervisory and Reset
Manager" button, the following window appears (Figure 27).
Figure 27. Supervisory and reset manager window
The undervoltage comparators are on the left-hand side. After filtering, the result of the
comparison between the voltage status and the undervoltage threshold is available for
reading, and it also sets a flip-flop. Push the "refresh" button to update the output status.
After an undervoltage event on one of the monitored voltages a "1" logic level appears at the
corresponding flip-flop output.
The flip-flops may be reset by pushing "Reset UVs latched", after this operation all the flip-
flop's output is '0'.
3.2.6 How to manage the interrupt controller
The L6460 contains one programmable interrupt controller that can be used to advise the
firmware, through the serial interface, when a certain event happens inside the IC. The
output of the interrupt circuit can be also redirected on a GPIO pin therefore the event can
be signaled directly to the external circuits.
In the first software window click the L6460 device and then the "IntCtrl" button, the following
window appears (Figure 28).