ISDN Data and Telephony Protocol Engine (inc. X.25)
CMX228
S1 Package
Signal
Description
80QFP
Pin No.
Name
Type
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
A14
A13
O/P
O/P
O/P
O/P
O/P
O/P
O/P
BI
Memory and Peripheral Address Bus
Memory and Peripheral Address Bus
A12
Memory and Peripheral Address Bus
A11
Memory and Peripheral Address Bus
A10
Memory and Peripheral Address Bus
A9
Memory and Peripheral Address Bus
A8
Memory and Peripheral Address Bus
A/D7
A/D6
A/D5
A/D4
A/D3
A/D2
A/D1
A/D0
ASTB
DVSS0
~
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
BI
BI
BI
BI
BI
BI
BI
O/P
Power
I/P
Address/Data Bus Strobe (data bus selected if low)
The digital negative supply rail (ground)
For manufacturer's use only. Connect to DVSS directly
HDLC Chip Reset
PSBRES
N/C
O/P
O/P
O/P
I/P
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
N/C
API-RXD
API-TXD
N/C
O/P
O/P
O/P
O/P
NC
ILFI
The digital positive supply rail. Levels and voltages are
dependent upon this supply. This pin should be
decoupled to DVSS by a capacitor
55
Power
DVDD0
56
57
RINGP1
RINGN1
O/P
O/P
POTS Port Ringing Generator (low when not ringing)
POTS Port Ringing Generator (high when not ringing)
ã 1999 Consumer Microcircuits Limited
ã 1999 Chiron Technology Limited
6
D/228/1
CMLMICRO [ CML MICROCIRCUITS ]
