ISDN Data and Telephony Protocol Engine (inc. X.25)
CMX228
S1 Package
Signal
Description
80QFP
Pin No.
58
Name
CLIP1
ILINE1
Type
O/P
I/P
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)
59
60
61
I/P
I/P
For manufacturer’s use only. Connect to DVSS directly
CMX605 C-BUS Interface - Reply Data
~
REPLY
CMD-
DATA
62
63
O/P
O/P
CMX605 C-BUS Interface - Command Data
CMX605 C-BUS Interface - Serial Clock
SER-CLK
The positive analogue supply rail. Levels and voltages
are dependent upon this supply. This pin should be
decoupled to AVSS by a capacitor
64
65
Power
Power
AVDD
AVREF1
A/D Reference Voltage. Connect to AVDD directly
AVSS
CSN1
N/C
66
67
68
Power
O/P
The negative analogue supply rail (ground)
CMX605 C-BUS Interface (chip select for POTS Port)
Do not make any connection to this pin
O/P
AVREF2
69
Power
D/A Reference Voltage. Connect to AVDD directly
AVREF3
NMI
70
71
72
73
74
75
76
77
78
79
80
Power
I/P
D/A Reference Voltage. Connect to AVSS directly
For manufacturer's use only. Connect to DVSS directly
API Interrupt (inactive = high)
API-INT
IRQN
I/P
I/P
CMX605 C-BUS Interface - Interrupt (inactive = high)
HDLC Chip Interrupt
PSBINT
RXD1
I/P
I/P
RS232 Port 1 Received Data - used for autobauding
RS232 Port 1 Ready To Send (inactive = high)
ISDN S-interface Chip Interrupt
RTS1
I/P
ISDNINT
DTR1
I/P
I/P
RS232 Port 1 Data Terminal Ready (inactive = high)
RS232 Port 1 Received Data (inactive = high)
RS232 Port 1 Transmitted Data (high when inactive)
RXD1
I/P
TXD1
O/P
Notes: I/P
=
Input
O/P = Output
BI Bidirectional
=
ã 1999 Consumer Microcircuits Limited
ã 1999 Chiron Technology Limited
7
D/228/1
CMLMICRO [ CML MICROCIRCUITS ]
