Figure 17.1 Block Diagram Of I - Renesas H8S/2158 User Manual

φ
SCL
SDA
1. ICDRX write = ICDRT write
Notes:
2. ICDRX read = ICDRR read
Legend:
2
ICCR : I C bus control register
2
I C bus mode register
ICMR :
I 2 C bus status register
ICSR :
I 2 C bus data register
ICDR :
Slave address register
SAR :
SARX : Second slave address register
IIC operation reservation adapter count register
ICCNT :
IIC operation reservation adapter control register
ICCRX :
IIC operation reservation adapter command register
ICCMD :

Figure 17.1 Block Diagram of I

Timeout
decision
circuit
Command
control
PS
Clock
control
Noise
canceler
Bus state
decision
circuit
Arbitration
decision
circuit
Output data
conrol
circuit
Noise
canceler
Section 17 I
Adapter
ICCNT
ICCRX
ICCMD
ICSRA
ICSRB
ICSRC
ICCR
ICMR
ICSR
ICDRX(W)
ICDRT
ICDRS
ICDRX(R)
ICDRR
Address comparator
SAR, SARX
Interrupt
generator
ICSRA : IIC operation reservation adapter status register A
ICSRB : IIC operation reservation adapter status register B
ICSRC : IIC operation reservation adapter status register C
ICDRX : IIC operation reservation adapter data register
ICDRT : IIC data transmit buffer
ICDRS : IIC data shift register
ICDRR : IIC data receive buffer
PS : Prescaler
2
C Bus Interface
Rev. 3.00 Jan 25, 2006 page 475 of 872
2
C Bus Interface (IIC)
* 1
* 2
Interrupt
request
REJ09B0286-0300