ISDN Data and Telephony Protocol Engine (inc. X.25)
CMX228
1.3
Signal List
S1 Package
80QFP
Signal
Description
Pin No.
Name
Type
1
2
3
4
5
6
7
SCL
SDA
O/P
BI
EEPROM - Serial Clock
EEPROM - Serial Data
ISDNRST
RI1
O/P
O/P
O/P
O/P
I/P
ISDN S-interface Chip Reset
RS232 Port1 Ring Indicator (high when inactive)
DCD1
CTS1
RSTN
RS232 Port1 Data Carrier Detect (high when inactive)
RS232 Port1 Clear To Send (high when inactive)
CMX228 Chip Reset (active low)
The digital positive supply rail. Levels and voltages are
dependent upon this supply. This pin should be
decoupled to DVSS by a capacitor
8
Power
DVDD1
9
XTALN
XTAL
DVSS1
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
STN
O/P
I/P
The output of the on-chip Xtal oscillator inverter
The input to the oscillator inverter from the Xtal circuit
The digital negative supply rail (ground)
POTS Port Off-Hook Indicator (HK1)
RS232 Port 1 Auto-Answer Indicator (AA)
RS232 Port 1 Data Carrier Detect Indicator (DCD)
RS232 Port 1 Ready To Send Indicator (RTS)
RS232 Port 1 Receive Data Indicator (RXD)
RS232 Port 1 Transmit Data Indicator (TXD)
RS232 Port 1 Data Terminal Ready Indicator (DTR)
ISDN Line Activated Indicator (AR)
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Power
O/P
O/P
O/P
O/P
O/P
O/P
O/P
O/P
O/P
O/P
O/P
O/P
O/P
O/P
O/P
O/P
O/P
Watchdog Timer Stimulus
LED9
WRN
RDN
A19
POTS Port Call Connected Indicator (CN1)
Memory Write Access Strobe
Memory Read Access Strobe
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
A18
A17
A16
A15
ã 1999 Consumer Microcircuits Limited
ã 1999 Chiron Technology Limited
5
D/228/1
CMLMICRO [ CML MICROCIRCUITS ]
