UPD16835AGS-BGG データシートの表示（PDF） - NEC => Renesas Technology

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UPD16835AGS-BGG

MONOLITHIC QUAD H BRIDGE DRIVER CIRCUIT

NEC => Renesas Technology 

µPD16835A

Data Configuration

Data can be input in either of two ways. Initial data can be input when the power is first applied, or standard data

can be input during normal operation. Input serial data with the LSB first, i.e., starting from the D0 bit (LSB) of the 1st

byte. Therefore, the D7 bit of the 8th byte is the most significant bit (MSB).

When inputting initial data, set a start point wait time that specifies the delay from power application to pulse

output, and the start point drive wait time. At the same time, also set a chopping frequency and a reference voltage

(EVR) that determines the output current of each channel. Because the µPD16835A has an EXT pin for monitoring

the internal operations, the parameter to be monitored can be selected by initial data.

When inputting standard data, input the rotation direction of each channel, the number of pulses, and the data for

the pulse cycle.

Initial data or standard data is selected by using bits D5 to D7 of the 1st byte (see Table 5-1).

Table 5-1. Data Selection Mode (1st byte)

D7

D6

D5

Data type

1

1

1

Initial data

0

0

0

Standard data

Remark If the high-order three bits are high, the initial data is selected;

if they are low, the standard data is selected.

Data other than (0, 0, 0) and (1, 1, 1) must not be input.

Input the serial data during start point wait time.

Details of Data Configuration

How to input initial data and standard data is described below.

(1) Initial data input

<1st byte>

The 1st byte specifies the type of data (initial data or standard data) and determines the presence or absence of

the EXP pin output. Bits D5 to D7 of this byte specify the type of data as shown in Table 5-1, while bits D0 to D3

select the EXP output (open drain).

Table 5-2. 1st Byte Data Configuration

Bit

D7

D6

D5

D4

D3

D2

D1

D0

Data

1

1

1

0

0 or 1 0 or 1 0 or 1 0 or 1

The EXP pin goes low (current sink) when the input data is “0”, and high (high impedance state) when the input

data is “1”. Pull this pin up to VDD for use. Input “0” to bit D4.

12

Data Sheet S15973EJ1V0DS

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