STWBC2-HP datasheet(38/96 Pages) STMICROELECTRONICS

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2.2.3.4.6

Change timing on-the-fly

Blanking time and time-out can be changed on-the-fly. To do so, write the new value and set the bit UPDATE

of the QF_BLANKING_TIME_H or QF_TIMEOUT_H registers respectively. The update can be done optimally by

writing the low byte first and then writing the high part of the value ORed with 0x80. 0x80 corresponds to the

UPDATE bit.

2.2.3.5

Operating parameters

Table 26 summarizes the IP functional operating parameters:

Table 26. QF controller main parameters

Parameter

Condition

Value

Operating frequency

8 MHz – 40 MHz

Measurable ring frequency

clk = 40 MHz

clk = 16 MHz

clk = 8 MHz

>4.9 kHz

>1.9 kHz

>0.9 kHz

2.2.3.6

Configuration register overview

Table 27 shows the list of QF configuration registers overview:

Table 27. QF configuration registers overview

Registers overview

Name

Description

Type

Page

Offset

Reset val.

QF_CTRL

Control configuration

R/W

0x14

0x10

QF_BLANKING_TIME_L

Blanking time low value

R/W

0x15

0x00

QF_BLANKING_TIME_H

Blanking time high value

R/W

0x16

0x00

QF_TIMEOUT_L

Time-out low value

R/W

0x17

0x00

QF_TIMEOUT_H

Time-out high value

R/W

0x18

0x00

QF_CYCLE_TIME_L

Cycle time low value

R/W

0x19

0x00

QF_CYCLE_TIME_H

Cycle time high value

R/W

0x1A

0x00

QF_ISET

Drive current setting

R/W

0x1B

0x00

2.2.4

Gate driver mode, IO mode and mux

2.2.4.1

Overview

This logic generates the gate driver and the I/O signals.

2.2.4.2

Feature list

•

Control embedded gate driver operations

•

Control IO line mode operation

•

Control mux signals routed to GD or I/O lines

2.2.4.3

Functional description

The STWBC2-HP embeds three gate drivers and four configurable external I/O lines (GPIO_DR0 to GPIO_DR3).

A mux allows routing the different generators to the gate drivers or IO control cells:

STWBC2-HP

Digital AFE functions

DS13825 - Rev 1.0

page 38/96

STWBC2-HP Datasheet(PDF) 38 Page - STMicroelectronics

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