Analog Integrated Circuit Device Data

12

Freescale Semiconductor

MM912_P812

PIN CONNECTIONS

Calibration:

Note that Pins 46,47,70,75, and 76 are different between the S12P and the S12XEP100 SiPs.

For the S12P, these pins can be used as I/O:

Pin 46 = PJ0, Pin 47 = PJ1, Pin 70 = PE2, Pin 75 = PA6, Pin 76 = PAD09

For the S12XEP100, there must be:

220 nF, X7R ceramic capacitor between Pin 67 and 70

In order to have the same PC Board for both SiPs, it is necessary to place the pads for the three capacitors on the PC Board,

and use 0 ohm resistors to connect the 5 I/O (for the S12P) to the external circuitry. When the S12XEP100 is used, the capacitors

will be populated and the 0 ohm resistors will not be populated. When populated, if the I/O signals are not needed, then the 0

ohm resistors can be eliminated and only the capacitors are needed for the S12XEP100 boards.

MCU

90

PS1/TXD

I/O

PS1/

TXD (SCI)

Port S, I/O pin 1 is a general purpose input or output pin. It can be

configured as the receive pin TXD of serial communication interface

(SCI).

If used for ISO9141 connect to pin 3, MTX.

MCU

91

TEST

Input

Test

MUST leave OPEN. leave open

MCU

92

PM5/SCK

I/O

PM5/

SCK (SPI)

Port M, I/O pin 5 is a general purpose input or output pin. It can be

configured as the serial clock input pin for the serial peripheral interface

(SPI) when the SPI is in slave mode and as a serial clock output when

the SPI is in master mode.

Analog

93

RESET

Output

RESET Output to MCU Logic Level Reset signal used to reset the MCU when the watchdog

circuit times out, during under-voltage condition on VCC, and for initial

power up and power down. Provides RESET to MCU on pin 64.

Analog

94

INJFLT

Output

Injector Fault

Logic Level output to MCU indicating any fault in the injector circuit.

Analog

95

RELFLT

Output

Relay Fault

Logic Level output to MCU indicating any fault in the relay circuit.

Analog

96

IGNFLT

Output

Ignition Fault

Logic Level output to MCU indicating any fault in the ignition circuit.

Analog

97

INJIN

Input

Injector Parallel Input

Logic Level Parallel input from the MCU to control the injector driver

output

Analog

98

RIN

Input

Relay Parallel Input

Logic Level Parallel input to activate RELAY output, ROUT

Analog

99

LAMPIN

Input

LAMP Parallel Input

Logic Level Parallel input to activate the malfunction indicator lamp

output, LAMP

Analog

100

IGNIN

Input

Ignition Parallel Input

Logic Level Parallel input from MCU controlling the ignition coil current

flow and spark.

-

EP

GND

Ground

Substrate Ground

Should be tied to the Ground plane. Connect to Ground.

Table 4. MM912_P812 Pin Definitions

Analog

or MCU

Pin

Pin Name

Pin

Function

Formal Name

Description and Recommendations