FX949 datasheet(5/25 Pages) CMLMICRO

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CDPD Wireless Modem Data Pump

FX949

D/949/5

Package

Signal

Description

Pin No.

Name

Type

CSN

I/P

Chip Select. An active low logic level input to the

modem, used to enable a data read or write

operation.

WRN

I/P

Write. An active low logic level input used to

control the writing of data into the modem from

the controlling

µP.

RDN

I/P

Read. An active low logic level input used to

control the reading of data from the modem into

the controlling

µP.

I/P

)

I/P

)

I/P

)

I/P

)

7 logic level modem register address select

I/P

)

inputs.

I/P

)

I/P

)

1, 6,

11, 19,

24, 30,

36, 37,

40, 41,

42, 48

6, 7,

16, 28,

30, 40,

43, 44

)

No internal connection: leave open circuit.

)

21, 22,

23, 25,

28, 29,

25, 26,

27, 29,

33, 34,

)

Internally connected: leave open circuit.

)

Notes:

I/P

Input

O/P =

Output

Bidirectional

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