33813 Datasheet, PDF (5/54 Pages) Freescale Semiconductor, Inc – One Cylinder Small Engine Control IC

3 Pin Connections
3.1 Pinout Diagram
Transparent Top View
O2HFB
O2HOUT
IGNSENSP
IGNSENSN
OH2SENSN
OH2SENSP
VRSOUT
VRSP
VRSN
CSB
VPWR
SCLK
48 47 46 45 44 43 42 41 40 39 38 37
1
36
2
35
3
34
4
33
5
32
6
31
7
30
8
29
9
28
10
27
11
26
12
25
13 14 15 16 17 18 19 20 21 22 23 24
RIN1
RIN2
O2HIN
IGNIN1
NC
INJIN1
NC
BATSW
MTX
MRX
TACHOUT
NC
3.2 Pin Definitions
Figure 3. 33813 Pin Connections
Table 2. 33813 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 24.
Pin
Pin Name
Pin
Function
Formal Name
Description
1
O2HFB
Input
O2 Sensor Heater Voltage feedback from drain of O2 Sensor Heater driver FET
Feedback Input
2
O2HOUT
Output
O2 Sensor Heater ^{Pre-driver output for O2 Sensor Heater driven by SPI input or O2HIN pin}
Output
3
IGNSENSP
Input
Ignition Current ^{Positive input to the ignition current sense differential amplifier}
Sense Input Positive Used to measure current in IGBT emitter resistor for IGNOUT1 and
IGNOUT2, if used.
4
IGNSENSN
Input
Ignition Current ^{Negative input to the ignition current sense differential amplifier}
Sense Input Negative Used to measure current in IGBT emitter resistor for IGNOUT1 and
IGNOUT2, if used.
5
O2HSENSN
Input
O2 Heater Current Negative input to the O2 heater current sense differential amplifier
Sense Input Negative Used to measure current in of O2 heater driver MOSFET source resistor, if
used.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33813
5