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Renesas HD6417641 Network Card User Manual

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Section 16 I

2

C Bus Interface 2 (IIC2)

Rev. 4.00 Sep. 14, 2005 Page 474 of 982

REJ09B0023-0400

SCL

ICCR1

Transfer clock

generation

circuit

Address

comparator

Interrupt

generator

Interrupt

request

Bus state

decision circuit

Arbitration

decision circuit

Noise canceler

Noise canceler

Output

control

Output

control

Transmission/

reception

control circuit

ICCR2

ICMR

ICSR

ICIER

ICDRR

ICDRS

ICDRT

I

2

C bus control register 1

I

2

C bus control register 2

I

2

C bus mode register

I

2

C bus status register

I

2

C bus interrupt enable register

I

2

C bus transmit data register

I

2

C bus receive data register

I

2

C bus shift register

Slave address register

NF2CYC register

[Legend]

ICCR1 :

ICCR2 :

ICMR :

ICSR :

ICIER :

ICDRT :

ICDRR :

ICDRS :

SAR :

NF2CYC:

SAR

SDA

Internal data bus

NF2CYC

Figure 16.1 Block Diagram of I

2

C Bus Interface 2

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