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参数资料
| 型号： | TC9446FG |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封装： | 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件页数： | 13/41页 |
| 文件大小： | 562K |
| 代理商： | TC9446FG |
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TC9446FG
2005-09-28
20
4)
ON/OFF of soft reset
The case where a program is started after program boot, and in restarting a program, it performs
ON/OFF of soft reset. ON/OFF of soft reset are performed by carrying out and transmitting the bit of
the soft reset in a 24 bit command to “H” (ON) and “L” (OFF).
Since data with which ON/OFF of soft reset follows a command is not required, STOP Condition is
transmitted after 24 bit command transmission.
In addition, in order to return from a incorrect operation state, when turning ON soft reset, it is
also possible to transmit a 24 bit command irrespective of the state of ACK bit.
The procedure of ON/OFF of soft reset is shown in Figure 14.
5)
Incorrect operation detection
Incorrect operation detection of the internal program of TC9446FG is judged by the existence of the
reaction to the access demand from a MCU. Therefore, R/W of data need to be performed from a MCU
to TC9446FG at the interval of about 6 ms or more.
ACK bit is set to “L”, when the following access demand opens the interval of about 6 ms or more
and is performed, since R/W of data were performed between about 6 ms back to the access demand
from a MCU when TC9446FG were operating normally.
However, if TC9446FG become a incorrect operation state, even if it is going to stop receiving the
access demand from a MCU, it is going to open the interval of about 6 ms or more and MCU is going
to make it access again, it will become a state ACK bit is “H” continued.
A MCU can perform incorrect operation detection by seeing this ACK bit.
That is, since TC9446FG are in a incorrect operation state when it is “H” fixation, even if ACK bit
passes about 6 ms or more, ACK bit is disregarded, soft reset is turned ON, and each setup of
TC9446FG is performed again.
Figure 14
Procedure of ON/OFF of Soft Reset
Transmission of I
2
C Address (3Ah)
Checking of ACK bit
= “L”
Transmission of 24 bit command
(soft reset ON/OFF
= 0000x0h)
STOP Condition
Soft reset ON/OFF
Soft reset ON: Bit
= “1”.
Soft reset OFF: Bit
= “0”.
START Condition
At the time of ACK
= “H”, it resumes from
START Condition. However, it is possible
to disregard and carry out command
transmission of the ACK bit at the time of
a reckless run.
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| TC9447F | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:Single-Chip Audio Digital Signal Processor |
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| TC9455N | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic |
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