TC94A48FG Datasheet, PDF (9/36 Pages) Toshiba Semiconductor – Single-chip Audio Digital Signal Processor

1.2 Timing Output
LRCKO / BCKO Pin Output Settings
Mode
0
1
2
3
4
LRCKO Pin Output
Fixed to GND
1fs
1fs
2fs
2fs
TC94A48FG
BCKO Pin Output
Fixed to ground
32fs
64fs
64fs
128fs
Remarks
Initial Value
MCKO Pin Output Settings
Mode
0
1
2
MCKO Pin Output
Fixed to GND
XCKI (=XI)
0.5 × XCKI
Remarks
It can be initialized by reset.
Undefined until set by microcontroller or
built-in DSP program
Note 3: A setup of a timing output is performed by the built-in firmware.
1.3 Example of oscillator circuit
The example of a circuit at the time of the crystal oscillator use in an oscillation part is shown in
figure 3.
Crystal oscillator connection
XI
64
11.2896MHz
1 ^XO
22pF
1MΩ
22pF
Figure 3 Example of oscillator circuit
1.4 Example of PLL circuit
A PLL circuit can consist of connecting LPF to a PLLC terminal easily. The example of a circuit is
shown in figure 4.
VCO
Phase　
Comp.
46 47 48
0.1uF
220Ω
0.01uF
47uF
VDD
Figure 4 Example of PLL circuit
The above-mentioned external constant is a reference value. It may change with application.
9
2005-09-28