Analog Integrated Circuit Device Data

32

Freescale Semiconductor

34921

FUNCTIONAL DEVICE OPERATION

LOGIC COMMANDS AND REGISTERS

Table 21. High-Side Out (HSOUT) Drivers Truth Table (Motor Driver Configured for H-bridge DC Motor)

Note: The HSOUT terminals are controlled by the OUT1 and OUT2 signals (Bit 14 and Bit 15 in the NORMAL input frame).

HSOUT is only available when DC motor is configured as Motor Driver C. (Set Bit 4 = 0 in CONFIG frame.)

Inputs

Output

Xdca

Xdcb

XPWM

OUTx

RST

TSD

HSOUTx

X

X

X

X

X

X

1

OFF

X

X

X

X

0

X

0

OFF

X

X

X

0

1

0

0

OFF

X

X

X

1

1

0

0

ON

X

X

X

1

1

1

0

Limited

Table 22. Step Motor Driver Truth Table (33)

A or B Bit

A

or B Bit

SPWMx Input

RST

TSD

Output x

Output x

X

X

X

X

X

1

OFF

OFF

X

X

X

X

0

0

OFF

OFF

X

X

X

1 (34)

1

0

Limited or OFF

Limited or OFF

0

0

X

0

1

0

OFF

OFF

0

1

0

0

1

0

ON

OFF

0

1

1

0

1

0

OFF

ON

1

0

0

0

1

0

OFF

ON

1

0

1

0

1

0

ON

OFF

1

1

X

0

1

0

OFF

OFF

Notes

33.

To reduce parasitic dissipation associated with the body diode, the counterphase is turned on for synchronous rectification.

34.

The current limit sense function may be disabled when the outputs are disabled. Hence, the output will oscillate between the requested

state from the Truth Table and this state.