isp1109 NXP Semiconductors, isp1109 Datasheet - Page 33

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

Philips Semiconductors
10. Clock wake-up scheme
9397 750 13355
Product data sheet
Fig 11. Random address read.
S
S
device select
read data K + 1
device select
Table 45:
This section explains the ISP1109 clock stop timing, events triggering the clock to wake
up, and the timing of the clock wake-up.
SDA line
S
Device select
ACK
Register address K
ACK
S
Device select
ACK
Read data K
ACK
Read data K + 1
ACK
:
Read data K + N
No ACK
P
wr
wr
ACK
ACK
ACK
Transfer format description for a multiple-byte read
register address K
register address K
read data K + 2
1 slave transmits and master reads data register K + N
random address single read
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. After a byte is read,
the address is automatically incremented by 1.
slave generates an acknowledgment
slave transmits and master reads data from register K + 1
slave generates an acknowledgment
:
register to read. After incrementing, the address rolls over to 0. Here, N
represents the number of addresses available in the slave.
master terminates the read operation by generating a No Acknowledge
master generates a STOP condition
random access multiple read
Rev. 01 — 14 July 2005
ACK
ACK
ACK
.... maximum, rollover to 0
S
S
device select
device select
ACK
rd
rd
USB transceiver with carkit support
ACK
ACK
write data K + N - 1
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
read data K
read data K
004aaa571
no ACK
1. This is the last
no ACK
ACK
ISP1109
P
P
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