SC18IS600_601_3

© NXP B.V. 2006. All rights reserved.

Product data sheet

Rev. 03 — 13 December 2006

13 of 28

NXP Semiconductors

SC18IS600/601

SC18IS600/601 will place this data in the receiver buffer, and will generate an interrupt on

the INT pin. The ‘transaction completed’ status can be read in the I2CStat. Note that the

data is not returned until a read buffer command is performed (see Section 6.6.4 “Read

buffer”).

Note that the third byte sent by the host is the device slave address. The SC18IS600/601

will ignore the least significant bit so a read will always be performed even if the least

significant bit is a ‘0’. The maximum number of bytes to be read is 96.

Once the host issues this command, the SC18IS600/601 will start a write transaction on

will read data from the specified slave, place the data in the Receiver Buffer and generate

an interrupt on the INT pin. The ‘transaction completed’ status can be read in I2CStat.

Note that the data is not returned until a ‘read buffer’ command is performed.

6.6.4 Read buffer

NUMBER

OF BYTES

0x01

COMMAND

SLAVE ADDRESS

+ R

SPI host sends

CS

SCLK

MOSI

1

slave address A[7:1]

number of bytes D[7:0]

command 0x01

002aab719

002aab720

NUMBER OF

WRITE

BYTES

0x02

COMMAND

SLAVE

ADDRESS

+ W

SPI host sends

DATA

WRITE

BYTE 0

DATA

WRITE

BYTE N

NUMBER OF

READ

BYTES

SLAVE

ADDRESS

+ R

Fig 15. Read buffer

002aab868

0x06

COMMAND

SPI host sends

DATA

BYTE 1

DATA

BYTE N