575
I
2
C Bus (IIC)
Chapter 18
Preliminary User’s Manual U17566EE1V2UM00
18.3 Configuration
The block diagram of the I
2
C0n is shown below.
Figure 18-1
Block diagram of I
2
C0n
IICEn
DQ
CLn1,
CLn0
SDAn
SCLn
IICLK
INTIICn
LRELn WRELnSPIEn WTIMn ACKEn STTn SPTn
MSTSn ALDn EXCn COIn TRCn ACKDn STDn SPDn
STCFn IICBSYn STCENn IICRSVn
CLDn DADn SMCn DFCn CLn1 CLn0
CLXn
Prescaler
Internal bus
Internal bus
IIC control register n
(IICCn)
IIC status register n (IICSn)
Set
Clear
Slave address
register n (SVAn)
Noise
eliminator
Match signal
IIC shift
register n (IICn)
SO latch
Start condition
generator
Data hold
time correction
circuit
Acknowledge
output circuit
Wake-up controller
N-ch open-drain
output
Acknowledge detector
Star t condition
detector
Stop condition
detector
Serial clock counter
Interrupt request
signal generator
Noise
eliminator
Serial clock
controller
Serial clock
wait controller
Bus status
detector
IIC clock select
register n (IICCLn)
IIC function expansion
register n (IICXn)
IIC flag register n
(IICFn)
N-ch open-drain
output
OCKSn0
IIC division clock select
register m (OCKSn)
OCKSn1
OCKSTHn
OCKSENn
Prescaler
IICLKPS = IICLK to IICLK/5
IICLKTC
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