AS5510 datasheet(18/31 Pages) AMSOSRAM

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[v1-07] 2015-Feb-27

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AS5510 − Detailed Description

Slave Transmitter Mode (Read Mode)

The first byte is received and handled as in the slave receiver

mode. However, in this mode, the direction bit indicates that

the transfer direction is reversed. Serial data is transmitted on

SDA by the AS5510 while the serial clock is input on SCL. START

and STOP conditions are recognized as the beginning and end

of a serial transfer (Figure 17 and Figure 18). The slave address

byte is the first byte received after the master generates a START

condition. The slave address byte contains the 7-bit AS5510

address. The 7-bit slave address is followed by the direction bit

(R/W), which, for a read, is 1. After receiving and decoding the

slave address byte the device outputs an acknowledge on the

SDA line. The AS5510 then begins to transmit data starting with

the register address pointed to by the register pointer. If the

mode the first address that is read is the last one stored in the

to end a read.

Figure 17:

Data Read (from Current Pointer Location) - Slave Transmitter Mode

Figure 18:

Data Read (Write Pointer, Then Read) - Slave Receive and Transmit

1010110

XXXXXXXX

S – Start

A – Acknowledge (ACK)

Data transferred: X+1 Bytes + Acknowledge

NA – Not Acknowledge (NACK)

Note: Last data byte is followed by NACK

P – Stop

<Data(n)>

<Data(n+1)>

<Data(n+X)>

XXXXXXXX

<Data(n+2)>

1010110

XXXXXXXX

1010110

XXXXXXXX

S – Start

SA – Repeated Start

A – Acknowledge (ACK)

Data transferred: X+1 Bytes + Acknowledge

NA – Not Acknowledge (NACK)

Note: Last data byte is followed by NACK

P – Stop

<Data(n+1)>

XXXXXXXX

<Data(n)>

XXXXXXXX

<Data(n+X)>

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