Block Diagram And Structure Of The I; C Interface - Fujitsu F2MC-16LX Hardware Manual

Mb90550a/b series, 16-bit
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19.2 Block Diagram and Structure of the I

Figure 19.2-1 shows a block diagram of the I
2
structure of the I

C interface.

■ Block Diagram of the I
2
C Interface
Figure 19.2-1 Block Diagram of the I
ICCR
2
I
C enabled
EN
Clock divider 1
ICCR
5
6
7
8
CS4
Clock selection 1
CS3
Clock divider 2
CS2
2 4 8
16
32
CS1
Clock selection 2
CS0
IBSR
Bus busy
BB
Repeat start
RSC
Last Bit
LRB
Send and
receive
TRX
FBT
Detection of an arbitration loss
AL
IBCR
BER
BEIE
Interrupt request
INTE
INT
IBCR
Start
SCC
Master
MSS
ACK allowed
ACK
GC-ACK allowed
GCAA
IBSR
Slave
AAS
Comparison of
Global call
the slave address
GCA
19.2 Block Diagram and Structure of the I
2
C Interface
2
C interface, and Figure 19.2-2 shows the
2
C Interface
Machine clock
64 128 256
Sync
Edge change timing
of the shift clock
Detection of start
and stop condition
Error
First Byte
IRQ
Termination
Generation of start
and stop condition
IDAR
IADR
2
C Interface
Generation of
the shift clock
SCL
SDA
303

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