4.17

Voltage Regulator

use the internal voltage regulator connect:

There are three options to reduce the managers’ power dissipation by regulating voltage outside the chip.

• Use an external NPN transistor to regulate the 5 V. In this setup, the configuration of regulators pins should be

as follows.

– DRV_VAUX5 is connected to NPN BASE

• Supply the manager with an external 5 V voltage regulator. In this setup, regulators pins configuration should be

as follows.

– DRV_VAUX5 is not connected (left open)

• Supply the manager with an external 3.3 V voltage regulator. In this setup, regulators pins configuration should

be as follows.

– VAUX3P3_INT is not connected (left open)

4.18

SPI Communication

The following table lists the SPI communication packet structure.

Table 4-1. SPI Communication—Packet Structure

Control Byte

Selects Manager

According to

Address

R/W Bit

Internal

Register

Address

Number of Words

(Read Access Only)

Data Written to IC

(Write Access Only)

Read from IC (Read

Access Only)

8 bits

R(0)/W(1)

8 bits

8 bits

16 bits

4.18.1

SPI Addressing

The manager operates in the 8-bit address and 16-bit data. It responds to SPI transaction if the first SPI byte (IC

address byte bits[7:1]) complies with the following.

Table 4-2. Manager SPI Addressing

3 Bits (bit 7:5)

4 Bits (bit 4:1)

1 Bit (bit 0)

000

Address Input Pin

Read/Write

4.18.2

Broadcast

A broadcast command is intended to instruct all connected manager ICs to perform a specific operation.

The broadcast command is a write command with the standard packet structure. In a broadcast read operation, the

read data is not valid and the read operation has no impact.

PD69208T4/PD69204T4/PD69208M

Application Information

Datasheet

DS00003428C-page 19