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| 型号： | TC9444F |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP60 |
| 封装： | 14 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-60 |
| 文件页数： | 14/28页 |
| 文件大小： | 378K |
| 代理商： | TC9444F |
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TC9444F
2002-01-11
21
6.
Reset Timing
After turning on the power supply, always perform a reset by setting the /RESET pin to Low.
Figure 6. shows the reset and boot timing.
When performing a power-on reset, note the timing shown in Figure 6.2.
7.
Microcontroller Interface Signal Timing
Microcontroller interface signal timing supports three-lead mode and I2C bus mode.
7.1
Three-Lead Bus Mode
Setting IFSEL
= “H” sets the microcontroller interface to three-lead bus mode.
Setting the CS signal
= “L” enables control from the microcontroller.
Figure 7. shows the interface timing when three-lead mode is selected.
When transmitting two or more commands, be sure to set CS to H between each command.
When writing to coefficient or offset RAM, be sure to write the data word by word in fs per word.
As coefficient or offset RAM cannot be updated in multiple-word batches, take particular care when
updating filter coefficients.
7.2
I
2
C Bus Mode
Setting IFSEL
= “L” sets the microcontroller interface to I2C bus mode.
In I2C bus mode, the CS pin can be fixed to “L”. Note that the CS pin signal can also be used as
the chip select signal.
The I2C slave address is:
MSB
LSB
0
000
^^^^^^^^^^^^^
Data can only be written to this address. Therefore, fix the LSB of read/write mode bits to 0.
As I2C bus mode does not permit continuous writing, insert an END condition after each command,
then a START condition to start writing data again.
Figure 6.2
Power-On Reset Timing
VDD
80%
RESET
40%
tRST > 1 ms
Figure 6.1
Reset and Boot
tRw > 0.2 s
tBOOT < 50 s
Boot operation completed. Do not write to
the coefficient or offset RAM until boot is
complete.
RESET
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相关代理商/技术参数 |
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|---|---|
| TC9446F | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:Audio Digital Processor for Decode of Dolby Digital (AC-3), MPEG2 Audio |
| TC9446F-033 | 制造商:Panasonic Industrial Company 功能描述:IC |
| TC9446FG | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:Audio Digital Processor for Decode of Dolby Digital (AC-3), MPEG2 Audio |
| TC9447F | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:Single-Chip Audio Digital Signal Processor |
| TC9452F | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:SINGLE CHIP SURROUND LSI |
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