OM6271 NXP Semiconductors, OM6271 Datasheet - Page 14

• Manufacturer Part Number: OM6271
• Description: Interface Modules & Development Tools SPI to I2C Master Bridge Demoboard
• Manufacturer: NXP Semiconductors

Specifications of OM6271

• Interface Type: I2C, SPI
• Data Bus Width: 8 bit
• For Use With/related Products: SC18IS601IPW
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
SC18IS600_601_5
Product data sheet
6.6.2 Read N bytes from I
6.6.3 I
6.6.4 Read buffer
Once the host issues this command, the SC18IS600/601 will start an I
transaction on the I
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
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
the I
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.
2
Fig 14. Read N bytes from I
Fig 15. I
Fig 16. Read buffer
C-bus read after write
SPI host sends
COMMAND
2
C-bus to the specified slave address. Once the data is written, the SC18IS600/601
0x02
2
C-bus read after write
SPI host sends
COMMAND
SCLK
MOSI
NUMBER OF
0x01
CS
WRITE
BYTES
2
C-bus to the specified slave address. Once the data is received, the
OF BYTES
NUMBER
command 0x01
2
Rev. 05 — 28 July 2008
NUMBER OF
C-bus slave device
BYTES
READ
SPI host sends
2
COMMAND
C-bus slave device
0x06
SLAVE ADDRESS
ADDRESS
+ R
number of bytes D[7:0]
SLAVE
BYTE 1
+ W
DATA
WRITE
BYTE 0
DATA
BYTE N
002aab868
DATA
slave address A[7:1]
SC18IS600/601
SPI to I
BYTE N
WRITE
DATA
Section 6.6.4 “Read
2
© NXP B.V. 2008. All rights reserved.
C-bus read
002aab719
2
1
C-bus interface
ADDRESS
SLAVE
+ R
002aab720
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