UPD168112 Просмотр технического описания (PDF) - NEC => Renesas Technology

Номер в каталоге

Компоненты Описание

производитель

UPD168112

SERIAL CONTROL H-BRIDGE DRIVER FOR CAMERA LENS DRIVING

NEC => Renesas Technology 

µPD168112

FUNCTIONAL DESCRIPTION

Serial Control

All information for driving the motor is processed by serial data from the CPU. The following parameters can be set

by commands.

- Wait value for setting timing when a stepper motor is driven

- Motor current, motor revolution direction, and output excitation mode

- Pulse cycle, and number of pulses

Each command is assigned an address. Each data can be updated by inputting 8-bit data. For the configuration of

the data and details of commands, refer to SERIAL INTERFACE SPECIFICATIONS on page 12.

2-phase Excitation Mode

By allowing a current of ±100% to flow into output phases A and B, the motor can be driven with a large torque. The

motor can be stopped in electrical cycle angle units of 90°. The two-phase excitation mode or 1-2 phase excitation

mode is selected by a command.

1-2 Phase Excitation Mode

By allowing a current of ±100% to flow into either output phase A or B and a current of ±70% to flow into the other

phase, the motor can be positioned with an accuracy higher than that in the two-phase excitation mode. The motor

can be stopped in electrical cycle angle units of 45°.

The two-phase excitation mode or 1-2 phase excitation mode is selected by a command.

Reset Function

An initialization operation is performed and all the internal data is cleared to 0 when RESET = low level. The output

remains in the Hi-Z state. When RESET = high level, commands can be input. Be sure to perform a reset operation

after power application. When RESET = low level, the internal circuitry is stopped whenever possible, so that the self

current consumption can be reduced. When input of the external CLK is stopped, the current consumption can be

lowered to 1 µA MAX.

Power Application Sequence

This IC has a logic power supply (VDD) pin and an output power supply (VM) pin.

To turn on power, turn on VDD and then VM.

To turn off power, turn off VM with VDD on, and then turn off VDD.

(VDD and VM can also be turned on/off at the same time.)

Data Sheet S15866EJ1V0DS

11

Share Link: