isp1109 NXP Semiconductors, isp1109 Datasheet - Page 29

• Manufacturer Part Number: isp1109
• Description: Universal Serial Bus Transceiver With Carkit Support
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 13355
Product data sheet
Fig 7. SPI transfer.
SPI_MOSI
SPI_MISO
SPI_CLK
SPI_CS
9.4.1 I
9.4 I
write_en address 4
To read a field of data, pin SPI_MISO will output the data field pointed to by the five
address bits loaded at the beginning of the SPI sequence.
Figure 7
Figure 8
For detailed information, refer to The I
Table 38:
[1]
[2]
[3]
2
2
S
Fig 8. SPI multiple read and write.
C-bus byte transfer format
C-bus protocol
[1]
S = Start.
A = Acknowledge.
P = Stop.
SPI_MOSI
SPI_MISO
SPI_CS
shows the details of an SPI transfer.
shows a multiple read and write by using the SPI bus.
Byte 1
address 3 address 2 address 1 address 0
8 bits
I
2
C-bus byte transfer format
preamble
A
[2]
Rev. 01 — 14 July 2005
first address
25-bit data
25-bit data
Byte 2
8 bits
2
C-bus Specification; Version 2.1 .
A
dead bit
[2]
preamble
data 24
USB transceiver with carkit support
Byte 3
8 bits
data 24
another address
25-bit data
25-bit data
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
data 23
data 23
A
[2]
..
..
ISP1109
004aaa490
data 0
data 0
004aaa489
A
[2]
29 of 59
P
[3]