upd16835 Renesas Electronics Corporation., upd16835 Datasheet - Page 12

• Manufacturer Part Number: upd16835
• Description: Monolithic Quad H Bridge Driver Circuit
• Manufacturer: Renesas Electronics Corporation.

Data Configuration
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).
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 PD16835 has an EXT pin for monitoring the
internal operations, the parameter to be monitored can be selected by initial data.
the pulse cycle.
Details of Data Configuration
(1) Initial data input
<1st byte>
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).
is “1”. Pull this pin up to V
12
Data can be input in either of two ways. Initial data can be input when the power is first applied, or standard data
When inputting initial data, set a start point wait time that specifies the delay from power application to pulse output,
When inputting standard data, input the rotation direction of each channel, the number of pulses, and the data for
Initial data or standard data is selected by using bits D5 to D7 of the 1st byte (see Table 5-1).
Input the serial data during start point wait time.
How to input initial data and standard data is described below.
The 1st byte specifies the type of data (initial data or standard data) and determines the presence or absence of the
The EXP pin goes low (current sink) when the input data is “0”, and high (high impedance state) when the input data
Data
Bit
Remark If the high-order three bits are high, the initial data is selected;
DD
D7
for use. Input “0” to bit D4.
1
D7
1
0
Data other than (0, 0, 0) and (1, 1, 1) must not be input.
if they are low, the standard data is selected.
Table 5-1. Data Selection Mode (1st byte)
D6
Table 5-2. 1st Byte Data Configuration
1
D6
1
0
Data Sheet G11594EJ2V0DS00
D5
1
D5
1
0
D4
0
Initial data
Standard data
0 or 1
D3
Data type
0 or 1
D2
0 or 1
D1
0 or 1
D0
PD16835