SC18IS601 Philips Semiconductors, SC18IS601 Datasheet - Page 13

• Manufacturer Part Number: SC18IS601
• Description: (SC18IS600 / SC18IS601) SPI to IC-bus interface
• Manufacturer: Philips Semiconductors

NXP Semiconductors
SC18IS600_601_3
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 13. Read N bytes from I
Fig 14. I
Fig 15. 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
Rev. 03 — 13 December 2006
OF BYTES
NUMBER
command 0x01
2
NUMBER OF
C-bus slave device
BYTES
READ
2
SPI host sends
C-bus slave device
COMMAND
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. 2006. All rights reserved.
C-bus read
002aab719
2
1
C-bus interface
ADDRESS
SLAVE
+ R
002aab720
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