CDPD Wireless Modem Data Pump
FX949
Package
L4
Pin No.
33
Package
L6
Pin No.
37
Signal
Name
CSN
Type
I/P
Description
34
38
WRN
I/P
Chip Select. An active low logic level input to the
modem, used to enable a data read or write
operation.
Write. An active low logic level input used to
control the writing of data into the modem from
the controlling
µ
P.
Read. An active low logic level input used to
control the reading of data from the modem into
the controlling
µ
P.
)
)
)
)
)
)
)
35
39
RDN
I/P
38
39
43
44
45
46
47
41
42
1
2
3
4
5
A6
A5
A4
A3
A2
A1
A0
I/P
I/P
I/P
I/P
I/P
I/P
I/P
7 logic level modem register address select
inputs.
1, 6,
11, 19,
24, 30,
36, 37,
40, 41,
42, 48
21, 22,
23, 25,
28, 29,
31
6, 7,
16, 28,
30, 40,
43, 44
)
)
)
)
)
)
)
)
)
)
No internal connection: leave open circuit.
25, 26,
27, 29,
33, 34,
35
Internally connected: leave open circuit.
Notes:
I/P =
O/P =
BI =
Input
Output
Bidirectional
©
1996 Consumer Microcircuits Limited
5
D/949/5
CMLMICRO [ CML MICROCIRCUITS ]
