SC18IS600(2006) View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

Manufacturer

SC18IS600
(Rev.:2006)

SPI to I2C-bus interface

NXP Semiconductors. 

NXP Semiconductors

SC18IS600/601

SPI to I2C-bus interface

master

SPICLK

PORT

MISO

MOSI

slave

SC18IS600/601

SCLK

CS

slave

OTHER SPI

DEVICE

PORT

SCLK

CS

Fig 11. SPI single master multiple slaves configuration

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6.6 SPI message format

6.6.1 Write N bytes to I2C-bus slave device

SPI host sends

0x00

NUMBER

COMMAND OF BYTES

SLAVE ADDRESS

+W

DATA

BYTE 1

DATA

BYTE N

CS

SCLK

MOSI

command 0x00

number of bytes D[7:0] slave address A[7:1] 0

Fig 12. Write N bytes to I2C-bus slave device

data byte 1

data byte N

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The SPI host issues the write command by sending a 0x00 command followed by the total

number of bytes (maximum 96 bytes excluding the address) to send and an I2C-bus slave

device address followed by I2C-bus data bytes, beginning with the first byte (data byte 1)

and ending with the last byte (data byte N). Once the SPI host issues this command, the

SC18IS600/601 will access the I2C-bus slave device and start sending the I2C-bus data

bytes.

When the I2C-bus write transaction has successfully finished, and interrupt is generated

on the INT pin, and the ‘transaction completed’ status can be read in I2CStat.

Note that the third byte sent by the host is the device I2C-bus slave address. The

SC18IS600/601 will ignore the least significant bit so a write will always be performed

even if the least significant bit is a ‘1’.

SC18IS600_601_3

Product data sheet

Rev. 03 — 13 December 2006

© NXP B.V. 2006. All rights reserved.

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