TC9446FG

2005-09-28

21

3.

Setting Procedure Until it Starts Decode Program Operation

Setting procedure until it starts operation of the decode program built in TC9446FG is shown below.

First, 10 words program data is transmitted in the program boot mode after release of the power-on reset

at the time of a power-supply injection.

However, when there is a program required for others, program data of a maximum of 128 words can be

transmitted.

And, if the command of soft reset-off is transmitted, a program will begin to operate and decode will be

started by transmitting addresses of the write-in command shown in an attached sheet (the program

explanation data) after that 9 words of 0000h-0008h.

Procedure until it starts operation of a decode program to Figure 15 is shown.

Note 7: Internal RAM is cleared, in order to muting for output, after transmitting a setup of command 0003h “decode

off” in the case of AC-3 decoder program. Please transmit following data after checking that ACK is set to

“L” from “H”, since such a case has the time for about 23 ms (maximum) in this processing. If processing of

the internal RAM clearance by the “decode off” command is completed, it will return at the waiting time for 1

or less ms.

In addition, according to the kind of decode program, please transmit following data after checking that ACK

is set to “L” from “H”, since the waiting time which the data transmission at the time of decode on/off takes

differs.

Figure 15

Procedure to Decode Program Operation Start

Program boot

Soft reset OFF

Starting of decode

Power ON reset

Write-in command transmission.

(9 word of 0000h to 0008h)

(9 word of continuing from 0000h are transmitted.)