Specifications

60 Telephone Interface
Table 4–1 (Cont.) Pin Assignments
Pin Name Function
7 SCL H This line is for the clock signal. The TLI
drives this line, controlling the rate of data
movement over the TX DATA H and RX
DATA H lines.
8 GND Ground.
9 SDIR H This line is for the direction signal. The TLI
drives this line, controlling the direction of
data movement over the TX DATA H and RX
DATA H lines.
10 GND Ground.
11 TX DATA H (SLD H) The module uses this line to send data to the
TLI assembly. Valid data only moves over
this line when the TLI asserts the SDIR H
signal.
12 GND Ground.
13 RX DATA H (ID H) The TLI assembly uses this line to send data
to the module. The TLI must turn off SDIR
H to send data over this line. Typically, the
TLI uses this line to send its identification
code to the module.
14 GND Ground.
15 GO H The module uses this line to reset the TLI.
This line carries the TLI RESET signal
described in Section 4.2.2.3. When GO H is
asserted, the TLI can make calls. When GO
H is not asserted, the TLI resets and cannot
make any calls until the module asserts GO
H again.
16 GND Ground.
17 MODULE
INSTALLED L
This line informs the TLI that a DTC04
module is connected to it.
18 GND Ground.
19 +5 V Supplies +5 V to the TLI assembly.
20 +12 V Supplies +12 V to the TLI assembly.