TCM320AC46 Datasheet, PDF (15/19 Pages) Texas Instruments – GEBERAL-PURPOSE AUDIO INTERFACE FOR DSP

ą
TCM320AC46
GENERALĆPURPOSE AUDIO INTERFACE FOR DSP
ą
SLWS001 − D4091, JUNE 1993
PARAMETER MEASUREMENT INFORMATION
All timing parameters are referenced to V_IH and V_IL. Bit 1 = MSB (most significant bit) and is clocked in first on DIN
or clocked out first on DOUT. Bit n = LSB (least significant bit) and is clocked in last on DIN or is clocked out last on
DOUT. N = 8 for the companded mode, and N = 16 for the linear mode.
Receive Time Slot
0
1
2
3
4
CLK
80%
20%
tsu(FSR)
80%
FSR
th(FSR)
20%
N−2
N−1
20%
See Note A
See Note B
th(DIN)
DIN N −1
N
1
2
3
4
N−2
N−1
See Note C
NOTES: A. This window is allowed for FSR high.
B. This window is allowed for FSR low.
C. Transitions are measured at 50%.
tsu(DIN)
Figure 2. Fixed-Data-Rate, Receive Side Timing Diagram
N
N+1
80%
N
1
CLK
FSX ^80%
DOUT
See Note C
TSX
0
1
80%
2
3
80%
20%
tsu(FSX)
th(FSX)
20%
See Note A
tpd1
20%
1
2
tpd4
Transmit Time Slot
4
N−2
N−1
N
N+1
80%
20%
tpd2
3
See Note B
N−2
tpd3
N−1
N
tpd5
80%
NOTES: A. This window is allowed for FSX high.
B. This window is allowed for FSX low (th(FSX) max determined by data collision considerations).
C. Transitions are measured at 50%.
Figure 3. Fixed-Data-Rate, Transmit Side Timing Diagram
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77001
15