isp1109 NXP Semiconductors, isp1109 Datasheet - Page 32

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

Philips Semiconductors
9397 750 13355
Product data sheet
9.4.4.1 Current address read
9.4.4.2 Random address read—Single read
9.4.4.3 Random address read—Multiple read
The transfer format description for a current address read is given in
illustration, see
Table 43:
Table 44
sequence.
Table 44:
The transfer format description for a multiple-byte read is given in
illustrates the byte sequence.
Byte
S
Device select
ACK
Read data K
No ACK
P
SDA line
S
Device select
ACK
Register address K
ACK
S
Device select
ACK
Read data K
No ACK
P
Fig 10. Current address read.
– Multiple-register read.
describes the transfer format for a single-byte read.
Transfer format description for current address read
Transfer format description for single-byte read
Figure
Description
master starts with a START condition
master transmits device address and read command bit R/W = 1
slave generates an acknowledgment
slave transmits and master reads data from register K. If the start address is
not specified, the read operation starts from where the index register is
pointing to because of a previous read or write operation.
master terminates the read operation by generating a No Acknowledge
master generates a stop condition
Description
master starts with a START condition
master transmits device address and write command bit R/W = 0
slave generates an acknowledgment
master transmits (start) address of register K to be read from
slave generates an acknowledgment
master restarts with a START condition
master transmits device address and read command bit R/W = 1
slave generates an acknowledgment
slave transmits and master reads data from register K
master terminates the read operation by generating a No Acknowledge
master generates a STOP condition
10.
Rev. 01 — 14 July 2005
S
device select
current address read
rd
ACK
read data K
USB transceiver with carkit support
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
004aaa570
no ACK
Figure 11
P
Table
Table
illustrates the byte
45.
ISP1109
43. For
Figure 11
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