Nxp Semiconductors UM10237 用户手册
UM10237_2
© NXP B.V. 2008. All rights reserved.
User manual
Rev. 02 — 19 December 2008
590 of 792
NXP Semiconductors
UM10237
Chapter 22: LPC24XX I
2
C interfaces I
2
C0/1/2
Fig 120. Format and States in the Master Transmitter mode
DATA
A
R
W
SLA
S
DATA
A
W
SLA
to Master
receive
mode,
entry
= MR
MT
to corresponding
states in Slave mode
A OR A
A OR A
A
other Master
continues
other Master
continues
A
other Master
continues
20H
08H
18H
28H
30H
10H
68H 78H B0H
38H
38H
arbitration lost
in Slave
address or
Data byte
in Slave
address or
Data byte
Not
Acknowledge
received after a
Data byte
Acknowledge
received after a
Data byte
Not
Acknowledge
received after
the Slave
address
Acknowledge
received after
the Slave
address
next transfer
started with a
Repeated Start
condition
started with a
Repeated Start
condition
arbitration lost
and
addressed as
Slave
and
addressed as
Slave
successful
transmission
to a Slave
Receiver
transmission
to a Slave
Receiver
from Master to Slave
from Slave to Master
any number of data bytes and their associated Acknowledge bits
n
this number (contained in I2STA) corresponds to a defined state of the
I
I
2
C bus
A
P
P
S
P