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參數(shù)資料
| 型號： | μPD789197 |
| 廠商： | NEC Corp. |
| 英文描述： | 8 Bit Single Chip Microcontrollers(8 位單片微控制器) |
| 中文描述： | 8位單片機微控制器（8位單片微控制器） |
| 文件頁數(shù)： | 82/146頁 |
| 文件大?。?/td> | 630K |
| 代理商： | ΜPD789197 |
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Preliminary Product Information
82
μ
PD789186, 789187, 789196, 789197
Figure 6-38. SMB Control Register 0 Format (4/4)
Cautions regarding set timing
Master receive operation: Setting during transmission is prohibited.
Set ACKE0 = 0; Can be set only after end of receive operation has been notified to slave.
Master send operation: Note that stop condition may not be generated normally during ACK period.
Setting at the same time as STT0 is prohibited.
Set SPT0 only during operation as master.
Note 1
Note that when WTIM0 = 0, if SPT0 is set during the wait period after 8-clock output, a stop condition is
generated during the high-level period of the 9th clock following wait release.
If it is necessary to output a 9th clock, change the setting of WTIM0 from 0 to 1 during the wait period
following 8-clock output, and set SPT0 during the wait period following the 9th clock output.
SPT0
0
1
Clear conditions (SPT0 = 0)
Note 2
Cleared with instruction
Cleared upon defeat in arbitration
Cleared automatically after detection of stop condition
Cleared by RESET input
Set conditions (SPT0 = 1)
Set with instruction
Stop condition trigger
Does not generate stop condition.
Generates stop condition (end transmission as master).
After setting SDA0 line to low level, sets SCL0 line to high level, or maintains SCL0 line at high level.
Then, secures rated time, changes SDA0 line from low level to high level, and generates stop condition.
Notes 1.
Set STP0 only during operation as master. However, for master operation by the time a stop condition
is detected for the first time following operation enable, SPT0 must be set once to generate a stop
condition.
2.
This flag's signals are made invalid by setting SMBE0 = 0.
Caution
While SMB status register 0 (SMBS0) bit 3 (TRC0) = 1, when WREL0 is set at the 9th clock and
wait is released, TRC0 is cleared and the SDA0 line is placed in high impedance.
Remark
STD0
ACKD0 : SMB status register 0 (SMBS0) bit 2
TRC0
: SMB status register 0 (SMBS0) bit 3
COI0
: SMB status register 0 (SMBS0) bit 4
EXC0
: SMB status register 0 (SMBS0) bit 5
MSTS0 : SMB status register 0 (SMBS0) bit 7
: SMB status register 0 (SMBS0) bit 1
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PD78F0134 | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| PD78F0134(A) | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| PD78F0134(A1) | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| PD78F0134A | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
| PD78F0134A1 | 制造商:NEC 制造商全稱:NEC 功能描述:8-Bit Single-Chip Microcontrollers |
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