4-1

HIP9010

Engine Knock Signal Processor

The HIP9010 is used to provide a method of detecting

premature detonation or “Knock” in automotive engines.

A block diagram of this IC is shown in Figure 1. The chip

alternately selects one of the two sensors mounted on the

engine block. Two programmable bandpass filters process

the signal from both sensors, and divides the signal into two

channels. When the engine is not knocking, programmable

gain adjust stages are set to ensure that both the reference

channel and the knock channel contain similar energies.

This technique ensures that the detection system is

comparatively immune to changes in the engine background

noise level. When the engine is knocking, the energy in the

knock channel increases.

Features

• Two Sensor Inputs

• Microprocessor Programmable

• Accurate and Stable Filter Elements

• Digitally Programmable Gain

• Digitally Programmable Time Constants

• Digitally Programmable Filter Characteristics

• On-Chip Clock

Applications

• Engine Knock Detector Processor

• Analog Signal Processing where Controllable Filter

Characteristics are Required

Pinout

HIP9010

(SOIC)

TOP VIEW

Ordering Information

PART NUMBER

TEMP.

PACKAGE

PKG.

NO.

HIP9010AB

-40 to 125

20 Ld SOIC (W)

M20.3

11

12

13

14

15

16

17

18

20

19

10

9

8

7

6

5

4

3

2

1

GND

INOUT

NC

NC

CS

INT/HOLD

OSCIN

OSCOUT

S0IN

S1FB

S1IN

NC

S0FB

NC

TEST

SCK

MOSI

MISO

Data Sheet

November 1998

File Number

3601.4

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207