SC18IS601 Philips Semiconductors, SC18IS601 Datasheet - Page 14

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

NXP Semiconductors
SC18IS600_601_3
Product data sheet
Fig 16. Write after write
SPI host sends
COMMAND
0x03
NUMBER OF
BYTES 1
6.6.5 I
6.6.6 SPI configuration
When the host issues a Read Buffer command, the SC18IS600/601 will return the data in
the read buffer on the MISO pin. Note that the Read Buffer will be overwritten if an
additional ‘Read N bytes’ or a ‘Read after write’ command is executed before the Read
Buffer command.
When the host issues this command, the SC18IS600/601 will first write N data bytes to
the I
device.
Table 9.
The SPI configuration command can be used to change the order in which the bits of SPI
data byte are sent on the SPI bus. In the LSB first configuration (SPI configuration data is
0x42), bit 0 is the first bit sent of any SPI byte. In MSB first (SPI configuration data is
0x81), bit 7 is the first bit sent.
programmed.
SPI configuration
0x42
0x81
2
NUMBER OF
Fig 17. SPI configuration
C-bus write after write
BYTES 2
2
C-bus slave 1 device followed by a write of M data bytes to the I
SPI configuration
ADDRESS + W
SLAVE 1
Rev. 03 — 13 December 2006
SPI host sends
COMMAND
SCLK
MOSI
Data order
LSB first
MSB first (default)
0x18
CS
BYTE 1
DATA
Table 9
CONFIGURATION
character 0x18
SPI
shows the two possible configurations that can be
BYTE N
DATA
SPI configuration data
ADDRESS + W
SLAVE 2
SC18IS600/601
002aab722
SPI to I
BYTE 1
DATA
2
C-bus slave 2
© NXP B.V. 2006. All rights reserved.
2
C-bus interface
BYTE N
DATA
002aab721
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