tp3155 National Semiconductor Corporation, tp3155 Datasheet - Page 7

• Manufacturer Part Number: tp3155
• Description: Tp3155 Time Slot Assignment Circuit
• Manufacturer: National Semiconductor Corporation

Applications Information
A combination of the TP3155 TSAC and any CODEC Filter
COMBO from the TP3052 3 4 7 or TP3064 7 series will
result in data timing as shown in Figure 1 Although the FS
output pulse goes high before BCLK goes high the D
put of the combo remains in the TRI-STATE mode until both
are high The eight bit period is shortened to prevent a bus
clash just as it is on the TP3020 1 CODECs
FIGURE 1 Transmit Data Timing
FIGURE 2 Control Data Timing
x
out-
x
7
Figure 2 shows typical timing for the control data interface
Figure 3 shows the digital interconnections of a typical line
Alternatively eight full-length bits can be obtained by invert-
ing the BCLK to the combo devices thereby aligning rising
edges of BCLK and FS
card application
X R
TL H 5118 – 7
TL H 5118 – 8