Section 17 I
2
C Bus Interface (IIC)
Rev. 3.00 Jan 25, 2006 page 486 of 872
REJ09B0286-0300
Bit
Bit Name
Initial Value R/W
Description
5
4
MST
TRS
0
0
R/W
R/W
Master/Slave Select
Transmit/Receive Select
00: Slave receive mode
01: Slave transmit mode
10: Master receive mode
11: Master transmit mode
Both these bits will be cleared by hardware when they
lose in a bus conflict in master mode of the I
2
C bus
format. In slave receive mode, the R/
W
bit in the first
frame immediately after the start condition automatically
sets these bits in receive mode or transmit mode by
hardware. The settings can be made again for the bits
that were set/cleared by hardware, by reading these bits.
When the TRS bit is intended to change during a transfer,
the bit will not be switched until data transfer ends.
[MST clearing conditions]
1. When 0 is written by software
2. When lost in bus conflict in I
2
C bus format master
mode
[MST setting conditions]
1. When 1 is written by software (for MST clearing
condition 1)
2. When 1 is written in MST after reading MST = 0 (for
MST clearing condition 2)
[TRS clearing conditions]
1. When 0 is written by software (except for TRS setting
condition 3)
2. When 0 is written in TRS after reading TRS = 1 (for
TRS setting condition 3)
3. When lost in bus conflict in I
2
C bus format master
mode
[TRS setting conditions]
1. When 1 is written by software (except for TRS
clearing condition 3)
2. When 1 is written in TRS after reading TRS = 0 (for
TRS clearing condition 3)
3. When 1 is received for the R/
W
bit value of the first
frame in I
2
C bus format slave mode
Содержание H8S/2158
Страница 10: ...Rev 3 00 Jan 25 2006 page viii of lii...
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...