Telephone Signalling Transceiver / Least Cost Router
CMX860
CMX860
D6, D1, E1
Pin No.
22
23
24
25
26
Signal
Name
HD
CSN
COMMAND
DATA
SERIAL
CLOCK
REPLY DATA
Type
I/P
I/P
I/P
I/P
T/S
Description
Schmitt trigger input to the Hook signal detector.
Connect to DV
SS
if Hook Detector not used.
The 'C-BUS' chip select input from the
µC.
The 'C-BUS' serial data input from the
µC.
The 'C-BUS' serial clock input from the
µC.
A 3-state 'C-BUS' serial data output to the
µC.
This output is high impedance when not sending
data to the
µC.
A ‘wire-ORable’ output for connection to a
µC
Interrupt Request input. This output is pulled
down to DV
SS
when active and is high impedance
when inactive. An external pullup resistor is
required i.e. R1 of Figure 2.
The digital positive supply rail. Levels and
thresholds within the device are proportional to
this voltage.
27
IRQN
O/P
28
DV
DD
Power
I/P = Input O/P = Output BI = Bidirectional T/S = 3-state Output NC = No Connection
©
2002 Consumer Microcircuits Limited
7
D/860/5
CMLMICRO [ CML MICROCIRCUITS ]
