Section 17 I
2
C Bus Interface (IIC)
Rev. 3.00 Jan 25, 2006 page 507 of 872
REJ09B0286-0300
TDRE = 0
Start condition detected
Rise of 9th clock in first frame
Write to ICDRX
Fall of 1st clock
Write to ICDRX
Fall of 1st clock
Rise of 9th clock
Stop condition detected
Rise of 9th clock
SDRF = 0
TDRE = 1
SDRF = 0
TDRE = 0
SDRF = 1
(a) Transmit mode
(b) Receive mode
SDRE = 0
RDRF = 0
TDRE = 1
SDRF = 1
TDRE = 0
SDRF = 1
SDRE = 0
RDRF = 1
SDRE = 1
RDRF = 1
Start condition detected
Fall of 8th clock
Fall of 8th clock
Read from ICDRX
Read from ICDRX
(Rise of 9th clock in first frame in master mode)
Stop condition detected
Stop condition detected
Figure 17.3 State Transitions of TDRE, SDRF, and RDRF Bits
17.3.11 IIC Operation Reservation Adapter Data Register (ICDRX)
ICDRX is an 8-bit register identical to ICDR. When this register is accessed for read, the contents
in the receive buffer (ICDRR) are read out; and when this register is accessed for write, the write
data is written to the transmit buffer (ICDRT). However, the IIC module operates in the way
defined by the operation reservation adapter when this register is read from or written to.
When the ICXE bit in ICCRX is set to 1, accesses to ICDR are invalid. The initial value of
ICDRX is undefined.
Summary of Contents for H8S/2158
Page 10: ...Rev 3 00 Jan 25 2006 page viii of lii...
Page 36: ...Rev 3 00 Jan 25 2006 page xxxiv of lii B Product Lineup 863 C Package Dimensions 864 Index 865...
Page 47: ...Rev 3 00 Jan 25 2006 page xlv of lii Appendix Figure C 1 Package Dimensions TBP 112A 864...
Page 54: ...Rev 3 00 Jan 25 2006 page lii of lii...
Page 70: ...Section 1 Overview Rev 3 00 Jan 25 2006 page 16 of 872 REJ09B0286 0300...
Page 118: ...Section 3 MCU Operating Modes Rev 3 00 Jan 25 2006 page 64 of 872 REJ09B0286 0300...
Page 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Page 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
Page 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Page 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Page 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Page 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Page 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Page 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Page 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Page 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Page 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Page 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Page 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...