Data Sheet G11594EJ2V0DS00

19

µµµµPD16835

(Data Update Timing)

The standard data (pulse width, number of pulses, rotation direction, current setting, and ENABLE) of this product

are set and updated at the following latch timing.

Table 5-14. Data Update Timing

ENABLE change

1

→ 10 → 11 → 00 → 0

Pulse width

FF2

↓

FF2

↓

FF2

↓

-

Number of pulses

FF2

↓

FF2

↓

FF2

↓

-

Rotation direction

FF2

↓

FF2

↓

FF2

↓

-

Current setting

FF2

↓

FF1

↓

FF2

↓

-

ENABLE

FF2

↓

FF1

↓

FF2

↓

-

The timing at which data is to be updated differs, as shown in Table 5-14, depending on the enabled status.

For example, suppose the enable signal is currently “0” (output high impedance) and “1” (output conduction) is input

by the next data. In this case, the pulse width, number of pulses, and rotation direction signals are updated at

FF2(upon the completion of start up wait), and the current setting and ENABLE signals are updated at FF1 (upon

completion of start up drive wait).

VD

FF1

Start up wait

FF2

Start up wait +

start up drive wait

Pulse output

VD

LATCH

I1

Pulse width, number of pulses, and rotation direction

are updated.

Current setting and ENABLE are updated

(ENABLE change: 0 to 1).

Initial data

identification

(1)

S1

(2)

S2

(3)

S3

Standard data

identification

I1 data is output.

FF1, FF2 output