ISDN Data and Telephony Protocol Engine (inc. X.25)
CMX228
S1 Package
80QFP
Pin No.
Signal
Description
Name
Type
POTS Port Line Voltage Adjustment (low if sending
FSK to a Caller Display unit, as it is intended to make
the SLIC present a high impedance to the POTS line)
POTS Port Hook Switch Status Detector
(on-hook = low)
For manufacturer’s use only. Connect to DV
SS
directly
CMX605 C-BUS Interface - Reply Data
CMX605 C-BUS Interface - Command Data
CMX605 C-BUS Interface - Serial Clock
The positive analogue supply rail. Levels and voltages
are dependent upon this supply. This pin should be
decoupled to AV
SS
by a capacitor
A/D Reference Voltage. Connect to AV
DD
directly
The negative analogue supply rail (ground)
CMX605 C-BUS Interface (chip select for POTS Port)
Do not make any connection to this pin
D/A Reference Voltage. Connect to AV
DD
directly
D/A Reference Voltage. Connect to AV
SS
directly
For manufacturer's use only. Connect to DV
SS
directly
API Interrupt (inactive = high)
CMX605 C-BUS Interface - Interrupt (inactive = high)
HDLC Chip Interrupt
RS232 Port 1 Received Data - used for autobauding
RS232 Port 1 Ready To Send (inactive = high)
ISDN S-interface Chip Interrupt
RS232 Port 1 Data Terminal Ready (inactive = high)
RS232 Port 1 Received Data (inactive = high)
RS232 Port 1 Transmitted Data (high when inactive)
58
CLIP1
O/P
59
60
61
62
63
64
ILINE1
∼
I/P
I/P
I/P
O/P
O/P
Power
REPLY
CMD-
DATA
SER-CLK
AV
DD
AV
REF1
AV
SS
CSN1
N/C
AV
REF2
AV
REF3
NMI
API-INT
IRQN
PSBINT
RXD1
RTS1
ISDNINT
DTR1
RXD1
TXD1
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
Power
Power
O/P
O/P
Power
Power
I/P
I/P
I/P
I/P
I/P
I/P
I/P
I/P
I/P
O/P
Notes:
I/P =
O/P =
BI
=
Input
Output
Bidirectional
©
1999
Consumer Microcircuits Limited
©
1999
Chiron Technology Limited
7
D/228/1
CMLMICRO [ CML MICROCIRCUITS ]
