Analog Integrated Circuit Device Data

Freescale Semiconductor

3

33977

PIN CONNECTIONS

PIN CONNECTIONS

Figure 3. 33977 Pin Connections

Table 1. 33977 Pin Definitions

A functional description of each pin can be found in the Functional Pin Description section beginning onpage 10.

Pin

Pin Name

Pin Function

Formal Name

Definition

1

2

3

4

(MS Motor

Pin #)

Output

H-Bridge Outputs 0

Each pin is the output of a half-bridge, designed to source or sink current.

5 to 8,

17 to 20

GND

N/A

Ground

Ground pins

9

CS

Input

Chip Select

This pin is connected to a chip select output of a Large Scale Integration

(LSI) Master IC and controls which device is addressed.

10

SCLK

Input

Serial Clock

This pin is connected to the SCLK pin of the master device and acts as a

bit clock for the SPI port.

11

SO

Output

Serial Output

This pin is connected to the SPI Serial Data Input pin of the Master device

or to the SI pin of the next device in a daisy chain.

12

SI

Input

Serial Input

This pin is connected to the SPI Serial Data Output pin of the Master

device from which it receives output command data.

13

RTZ

Multiplexed

Output

Return to Zero

This is a multiplexed output pin for the non-driven coil, during a Return to

Zero (RTZ) event.

14

VDD

Input

Voltage

This SPI and logic power supply input will work with 5.0 V supplies.

15

RST

Input

Reset

This pin is connected to the Master and is used to reset the device, or

place it into a sleep state by driving it to Logic [1]. When this pin is driven

to Logic [0], all internal logic is forced to the default state. This input has

an internal active pull-up.

16

VPWR

Input

Battery Voltage

Power supply

21, 22, 23, 24

NC

–

No Connect

These pins are not connected to any internal circuitry, or any other pin,

and may be connected to the board where convenient.

NC

NC

NC

NC

GND

GND

GND

GND

VPWR

RST

VDD

RTZ

COS+

COS-

SIN+

SIN-

GND

GND

GND

GND

CS

SCLK

SO

SI