ISDN Data and Telephony Protocol Engine (inc. X.25)
CMX228
S1 Package
80QFP
Pin No.
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
Signal
Description
Name
A14
A13
A12
A11
A10
A9
A8
A/D7
A/D6
A/D5
A/D4
A/D3
A/D2
A/D1
A/D0
ASTB
DV
SS0
~
PSBRES
N/C
N/C
API-RXD
API-TXD
N/C
NC
ILFI
DV
DD0
RINGP1
RINGN1
Type
O/P
O/P
O/P
O/P
O/P
O/P
O/P
BI
BI
BI
BI
BI
BI
BI
BI
O/P
Power
I/P
O/P
O/P
O/P
I/P
O/P
O/P
O/P
O/P
Power
O/P
O/P
Memory and Peripheral Address Bus
Memory and Peripheral Address Bus
Memory and Peripheral Address Bus
Memory and Peripheral Address Bus
Memory and Peripheral Address Bus
Memory and Peripheral Address Bus
Memory and Peripheral Address Bus
Memory and Peripheral Address and Data Bus
Memory and Peripheral Address and Data Bus
Memory and Peripheral Address and Data Bus
Memory and Peripheral Address and Data Bus
Memory and Peripheral Address and Data Bus
Memory and Peripheral Address and Data Bus
Memory and Peripheral Address and Data Bus
Memory and Peripheral Address and Data Bus
Address/Data Bus Strobe (data bus selected if low)
The digital negative supply rail (ground)
For manufacturer's use only. Connect to DV
SS
directly
HDLC Chip Reset
Do not make any connection to this pin
Do not make any connection to this pin
API/RS232 Port 2 Rx Data (inactive = high)
API/RS232 Port 2 Tx Data (high when inactive)
Do not make any connection to this pin
Do not make any connection to this pin
ISDN Line Failure Indicator
The digital positive supply rail. Levels and voltages are
dependent upon this supply. This pin should be
decoupled to DV
SS
by a capacitor
POTS Port Ringing Generator (low when not ringing)
POTS Port Ringing Generator (high when not ringing)
©
1999
Consumer Microcircuits Limited
©
1999
Chiron Technology Limited
6
D/228/1
CMLMICRO [ CML MICROCIRCUITS ]
