33892

MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA

4

10

SI

Serial Input

This terminal is a command data input terminal connected to the SPI Serial Data

Output of the MCU or to the SO terminal of the previous device of a daisy chain of

devices. The input requires CMOS logic level signals and incorporates an internal

active pull-down. Device control is facilitated by the input's receiving the MSB first of a

serial 8-bit control command. The MCU ensures data is available upon the falling edge

of SCLK. The logic state of SI present upon the rising edge of SCLK loads that bit

command into the internal command shift register. This terminal has an internal active

pull-down.

11

Digital Drain Voltage

(Power)

This terminal is an external voltage input terminal used to supply power to the SPI

logic, ensuring limited functionality of the device.

12

SO

Serial Output

This terminal is an output terminal connected to the SPI Serial Data Input terminal of

the MCU or to the SI terminal of the next device of a daisy chain of devices. This output

will remain tri-stated (high-impedance OFF condition) so long as the CS terminal of the

device is logic HIGH. SO is only active when the CS terminal of the device is asserted

logic LOW. The generated SO output signals are CMOS logic levels. SO output data

is available on the falling edge of SCLK and transitions immediately on the rising edge

of SCLK.

16

Positive Power Supply

This terminal connects to the positive power supply and is the source of operational

package.

14

21

HS3

HS2

High-Side Outputs

Protected 35 m

Ω high-side power output terminals to the load.

17, 18

19, 20

HS1 (Note 1)

HS0 (Note 2)

High-Side Outputs

Protected 10 m

Ω high-side power output terminals to the load.

22

FSI

Fail-Safe Input

The value of the resistance connected between this terminal and ground determines

the state of the outputs after a Watchdog timeout occurs. Depending on the resistance

value, either all outputs are OFF or the output HSO only is ON. If the FSI terminal is

left to float up to a logic [1] level, then the outputs HS0 and HS2 will turn ON when in

the Fail-Safe state. When the FSI terminal is connected to GND, the Watchdog circuit

and Fail-Safe operation are disabled. This terminal incorporates an active internal pull-

up.

23

CSNS

Output Current

Monitoring

The Current Sense terminal sources a current proportional to the designated HS0–

HS3 output. That current is fed into a ground referenced resistor and its voltage is

monitored by an MCU's A/D. The channel to be monitored is selected via the SPI. This

terminal can be tri-stated through SPI.

Notes

1.

HS1 output (17 and 18) must be connected externally on the PCB as close as possible to the terminals.

2.

HS0 output (19 and 20) must be connected externally on the PCB as close as possible to the terminals.

TERMINAL FUNCTION DESCRIPTION (continued)

Terminal

Terminal Name

Formal Name

Definition

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com