Section 17 I
2
C Bus Interface (IIC)
Rev. 3.00 Jan 25, 2006 page 497 of 872
REJ09B0286-0300
Bit
Bit Name
Initial Value
R/W
Description
1
AASHIT
0
R
Slave Address Match
0: In master mode or slave address does not match
1: Slave address matches
0
ACKBX
0
R
Acknowledge Bit Transmission Reserve
0: Reserves transmission of acknowledge bit 0
1: Reserves transmission of acknowledge bit 1
3
2
1
0
CLR3
CLR2
CLR1
CLR0
—
—
—
—
W
W
W
W
Clear 3 to 0
Writing B'0101 to these bits with an MOV instruction
initializes the internal latch circuit and state machine of
the conventional IIC module and the IIC operation
reservation adapter. The appropriate control bits of the
conventional IIC module and the IIC operation
reservation adapter must be initialized so as to
deactivate the IIC module.
When bits 7 to 4 in this register are set/cleared using a
bit manipulation instruction, the contents in BBSYX and
AASHIT are written to the CLR3 to CLR0 bits by
read/modify/write operation. However, since bit 2 is
always read as 0, clearing operation cannot be
executed.
17.3.8
IIC Operation Reservation Adapter Status Register A (ICSRA)
ICSRA monitors the operating status of the IIC module.
Bit
Bit Name
Initial Value
R/W
Description
7
SDAO
1
R
SDA Output Value
Monitors the output value from the SDA pin.
6
SCLO
1
R
SCL Output Value
Monitors the output value from the SCL pin.
5
SDAI
—
R
SDA Input Level
Monitors the input level to the SDA pin.
4
SCLI
—
R
SCL Input Level
Monitors the input level to the SCL pin.
Содержание H8S/2158
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Страница 36: ...Rev 3 00 Jan 25 2006 page xxxiv of lii B Product Lineup 863 C Package Dimensions 864 Index 865...
Страница 47: ...Rev 3 00 Jan 25 2006 page xlv of lii Appendix Figure C 1 Package Dimensions TBP 112A 864...
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Страница 70: ...Section 1 Overview Rev 3 00 Jan 25 2006 page 16 of 872 REJ09B0286 0300...
Страница 118: ...Section 3 MCU Operating Modes Rev 3 00 Jan 25 2006 page 64 of 872 REJ09B0286 0300...
Страница 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Страница 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
Страница 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Страница 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Страница 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Страница 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Страница 744: ...Section 20 Encryption Operation Circuit DES and GF Rev 3 00 Jan 25 2006 page 690 of 872 REJ09B0286 0300...
Страница 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Страница 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Страница 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Страница 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Страница 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Страница 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Страница 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...