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Philips Semiconductors
Volume 1
11.8.14 I
This section provides examples of operations that must be performed by various I
service routines. This includes:
User manual
S
SLA
W
A
08H
18H
Fig 33. Simultaneous repeated START conditions from two masters
STA Flag
STO Flag
SDA Line
SCL Line
Fig 34. Forced access to a busy I
STA Flag
SDA Line
SCL Line
1. Unsuccessful attempt to send a Start condition.
2. SDA Line released.
3. Succcessful attempt to send a Start condition; state 08H is entered.
Fig 35. Recovering from a bus obstruction caused by a low level on SDA
2
C State service routines
•
2
Initialization of the I
•
2
I
C Interrupt Service
Rev. 01 — 24 June 2005
DATA
A
S
OTHER MASTER CONTINUES
28H
Other Master sends Repeated
Start earlier
Time limit
2
C-bus
(1)
(1)
C block after a Reset.
UM10120
Chapter 11: I
P
S
08H
Retry
Start condition
(2)
(3)
Start condition
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
2
C interfaces
SLA
2
C state
138
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