TC9446FG Datasheet, PDF (7/41 Pages) Toshiba Semiconductor – Audio Digital Processor for Decode of Dolby Digital (AC-3), MPEG2 Audio

TC9446FG
Description of Operation
1. Micro Controller Interface
The TC9446FG can perform transmission and reception of serial data with a micro controller in the
serial mode or the I²C mode.
MIMD terminal performs a change in the serial mode and the I²C mode, and input and output of data
are performed at MSB first.
The use terminal and the function in the serial mode and the I²C mode are shown in Table 1.
The bit composition of a 24 bit command is shown in Table 2.
Note 4: This data sheet shows the general control method, refer to the program explanation data of an
attached sheet for a detailed command list, the control method, etc.
Table 1 Use Terminal and Function in the Serial Mode and the I²C Mode
Transmission Mode
Terminal
Input/Output
MICS
Input (3-5 V)
MILP
Input (3-5 V)
MIDIO
Input (3-5 V)/Output (3 V)
MICK
Input (3-5 V)
MIACK
Output (3 V)
Serial Mode (MIMD = L)
Functions
Chip selection signal input
Latch pulse signal input
Data input/output
Clock input
Acknowledge signal output and out of
control detection output
I²C Mode (MIMD = H)
Functions
Not used (fixed “L”)
Not used (fixed “L”)
Data input/output (SDA)
Clock input (SCL)
Out of control detection output
Note 5: MIDIO terminal needs pull-up resistance for the terminal exterior because of an open-drain output.
When using it by I²C bus, pull-up resistance is required also for MICK terminal.
Note 6: The addresses of an I²C bus are write-in address 3Ah and read-out address 3Bh.
Table 2 Bit Composition of 24 Bit Command
Bit Assign
Functions
23-8
7
6
5
4
16 bit address
Starting the incorrect operation detection output
Starting the program RAM boot
Setting the soft reset
Setting the Read/Write (R/W)
3-0
Setting the number of words for transmission
Remarks
Refer to the command list of the program explanation
data sheet
Starting the incorrect operation detection output by “1”
Starting the program RAM boot by “1”
Setting the soft reset ON by “1”
Setting the read by “1”
“0h”; a word
↓
“Fh”; 16 words
7
2005-09-28