TC9446FG Datasheet, PDF (25/41 Pages) Toshiba Semiconductor – Audio Digital Processor for Decode of Dolby Digital (AC-3), MPEG2 Audio

TC9446FG
DLL oscillation clock can be chosen with DLCKS terminal and DLON terminal, as shown in Table 5.
Table 5 Setup of DLL Circuit
DLCKS Terminal (93 pin)
“L”
“L”
“H”
“H”
DLON Terminal (92 pin)
“L”
“H”
“L”
“H”
DLL Oscillation Clock
SCKI input (DLL = off)
XI input * 4^th times
XI input * 3^rd times
XI input * 6^th times
When DLCKS terminal and DLON terminal are “L”, the external clock input from SCKI terminal is
chosen.
An internal clock of operation is a half divided clock of the DLL clock, and processing speed can
correspond a maximum of 75 MIPS. The clock outputted from DLL circuit should choose a crystal
oscillation clock to be set to less than 150 MHz. The example of DLL clock by the crystal oscillation clock is
shown in Table 6.
Table 6 Crystal Oscillation Clock and DLL Clock
Crystal Oscillation Clock
12.288 MHz
(48 kHz*256)
18.432 MHz
(48 kHz*384)
24.576 MHz
(48 kHz*512)
25.00 MHz
(asynchronous)
27.00 MHz
(asynchronous)
30.0 MHz
(asynchronous)
36.864 MHz
(48 kHz*768)
6^th Times Clock
73.728 MHz
(36 MIPS operation)
110.592 MHz
(55 MIPS operation)
147.456 MHz
(73 MIPS operation)
to 150 MHz
(75 MIPS operation)
Not available
Not available
Not available
4^th Times Clock
49.152 MHz
(24 MIPS operation)
73.728 MHz
(36 MIPS operation)
98.304 MHz
(49 MIPS operation)
100.00 MHz
(50 MIPS operation)
108.00 MHz
(54 MIPS operation)
to 120 MHz
(60 MIPS operation)
Not available
3^rd Times Clock
38.864 MHz
(18 MIPS operation)
55.296 MHz
(27 MIPS operation)
73.728 MHz
(36 MIPS operation)
75.00 MHz
(37 MIPS operation)
81.00 MHz
(40 MIPS operation)
90.00 MHz
(45 MIPS operation)
110.592 MHz
(55 MIPS operation)
Note 8: Crystal oscillation clock is as asynchronous as the system clocks (AD converter, DA converter, etc.) of
external LSI. A case needs to input the clock oscillated externally into CKI terminal, and needs to
synchronize with them.
7. Flag Input (FI0-FI3 terminal)
It is used when inputting a flag from a MCU. However, a function changes with built-in programs. FI0 to
FI3 terminal should fix each terminal to “H”, or since pull-up resistance is built in, when not being
specified by the program, please it be open and be used for it.
8. Interruption Input (IRQ terminal)
It is used when interrupting and inputting from a MCU. However, operation changes with built-in
programs. IRQ terminal should fix a terminal to “L”, or since pull down resistance is built in, when not
being specified by the program, please it be open and be used for it.
9. General-Purpose Output Terminal (PO0-PO7 terminal)
It can be used when carrying out logic control of the case where it is used as an interruption output to the
flag and the MCU for detection of internal operation, or the external LSI. However, the function and
operation of a terminal change with built-in programs. Since PO0-PO7 terminal contains pull-up resistance,
when not being specified by the program, please carry out and use each output terminal for opening.
At the time of a power-supply injection, the output of a general-purpose output terminal becomes unfixed.
“L” level will be outputted if it initializes with a reset terminal.
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2005-09-28