ISDN Dual Telephony Protocol Engine
CMX208
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
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
~
N/C
RINGP2
RINGN2
API-RXD
API-TXD
CLIP2
B1/B2N
ILFI
DV
DD0
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
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
Do not make any connection to this pin
POTS Port 2 Ringing Generator (low when not ringing)
POTS Port 2 Ringing Generator (high when not ringing)
API/RS232 Port Rx Data (inactive = high)
API/RS232 Port Tx Data (high when inactive)
POTS Port 2 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)
B-channel Select (high selects channel B1).
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
©
1999
Consumer Microcircuits Limited
©
1999
Chiron Technology Limited
5
D/208/1
CMLMICRO [ CML MICROCIRCUITS ]
