tc9446f TOSHIBA Semiconductor CORPORATION, tc9446f Datasheet - Page 14

• Manufacturer Part Number: tc9446f
• Description: Audio Digital Processor For Decode Of Dolby Digital Ac-3 , Mpeg2 Audio -
• Manufacturer: TOSHIBA Semiconductor CORPORATION

SDA
SCL
2-2.
2-2-1. Data Transmission Format in I
I
bit command after Address transmission.
finally, END Condition is transmitted.
command transmission, and ACK bit is set to “L”.
Read, a MCU needs to set ACK bit to “L” for every 8-bit Read data.
transmission.
from a MCU need to be performed at the interval of 6 ms or more.
2
START Condition
C Mode Setting
The foundations of a data transmission format in the I
Fundamentally, the data transmission at the time of the I
However, at the time of “H”, ACK bit performs Start Condition again, without performing STOP Condition, and transmits I
And, at the time of data Write of TC9446F, Write of 24 bit data of the number (1-16 word) of words set up by 24 bit command is performed from a MCU, and,
Moreover, it checks that transmit I
However, at the time of “H”, ACK bit performs Start Condition again, without performing STOP Condition, and transmits I
The word set up by 24 bit command after checking that ACK bit is “L”. Although Read of 24 bit data of a number (1-16 word) is performed, as for the inside of
And, only ACK bit added to the last 8 bits is set to “H”, and STOP Condition is transmitted.
Moreover, at the time of transmission of only a 24 bit command which does not perform R/W of data, END Condition is transmitted after 24 bit command
In addition, in TC9446F, polling of the access demand from a MCU is carried out every about 6 ms at the time of decode processing. Therefore, R/W of data
At the time of Write-in, Read-out and a command only shows the transmission format to Figure 7 to Figure 10.
I
2
C Address (3Ah)
I
2
C Address
R/W ACK
2
C Mode
2
Figure 7 Data Transmission Format in the I
C Address (read = 3Bh) from TC9446F at the time of Read to a MCU, without performing END Condition after 24 bit
DATA Hi (8 bit)
2
C mode are shown in Figure 7.
2
C mode checks that ACK bit is set to “L”, after making I
ACK
24 bit DATA (1 word to 16 word)
14
DATA Mid (8 bit)
ACK
2
C Mode
DATA Lo (8 bit)
2
C Address (write = 3Ah) to transmission.
2
2
C Address (3Ah). I
C Address (3Bh).
ACK
STOP Condition
2
C Transmit 24
2002-04-18
TC9446F