TS81000

Final Datasheet

Rev 1.3

June 2, 2015

www.semtech.com

7 of 16

Semtech

Read Register Operations

Description

START

Start of the I2C transfer

M[S

Slave Address (7 bits)

0 (1 bit) Slave ACK

Slave address + 0 as R/nW bit (0x92 as 8-bit).

M[S

Register n address (8 bits)

Slave ACK

Address of the first register.

START

Repeated Start.

M[S

Slave Address (7 bits)

1 (1 bit) Slave ACK

Slave address + 1 as R/nW bit (0x93 as 8-bit).

S[M

Register n Data (8 bits)

Master ACK

Read the first register.

S[M

Register n+1 Data (8 bits)

Master ACK

Optionally read the following registers.

...

S[M

Register n+k Data (8 bits)

Slave ACK

The master should send a nACK after the last data byte was

received.

STOP

Stop of the I2C transfer.

Run API Function Operations

Description

START

Start of the I2C transfer

M[S

Slave Address (7 bits)

0 (1 bit) Slave ACK

Slave address + R/nW bit (0x92 as 8-bit).

M[S

API number (8 bits)

Slave ACK

API number.

M[S

API input buffer length m (8 bits)

Slave ACK

API input buffer length. Equal to 0 if no input buffer data is

required by the API.

M[S

Input buffer data[0] (8 bits)

Slave ACK

First byte of the input buffer (optional).

M[S

Input buffer data[1] (8 bits)

Slave ACK

Second byte of the input buffer (optional).

...

M[S

Input buffer data[m-1] (8 bits)

Slave ACK

Last byte of the input buffer (optional).

STOP

Stop of the I2C transfer and execute the API function

Read API Function Return Buffer

Description

START

Start of the I2C transfer

M[S

Slave Address (7 bits)

0 (1 bit) Slave ACK

Slave address + R/nW bit (0x92 as 8-bit).

M[S

Register n address (8 bits)

Slave ACK

API number.

START

Repeated Start.

M[S

Slave Address (7 bits)

1 (1 bit) Slave ACK

Slave address + 1 as R/nW bit (0x93 as 8-bit).

S[M

API number (8 bits)

Master ACK

API number for the following return buffer.

S[M

API return buffer length n (8 bits)

Master ACK

API return buffer length.

S[M

Output buffer data[0] (8 bits)

Master ACK

Read the first byte in the output buffer.

S[M

Output buffer data[1] (8 bits)

Master ACK

Optionally read the following bytes.

...

S[M

Output buffer data[n-1] (8 bits)

Master nACK

The master should send a nACK after the last data byte was

received.

STOP

Stop of the I2C transfer.