CMX989 Datasheet, PDF (4/31 Pages) CML Microcircuits – CDPD MAC and Data Pump Processor

CDPD MAC and Data Pump Processor
CMX989
1.3 Signal List
Package
E1
Signal
Description
Pin No.
1
2
Name
XTALN
XTAL/CLOCK
3
IRQN
4
D7
5
D6
6
D5
7
D4
8
D3
9
D2
10
D1
11
D0
12
RDN
13
WRN
14
V_SS
15
DOC 2
16
DOC 1
17
V_BIAS
18
RXFB
19
RXIN
20
N/C
Type
O/P
I/P
BI
BI
BI
BI
BI
BI
BI
BI
I/P
I/P
Power
O/P
O/P
O/P
O/P
I/P
The output of the on-chip oscillator
The input to the on-chip oscillator, for external
Xtal circuit or clock
A ‘wire-ORable’ output for connection to the host
µController's Interrupt Request input. This output
has a low impedance pull down to V_SS when
active and is high impedance when inactive.
)
)
)
) 8-bit bi-directional 3-state µController interface
data lines
)
)
)
)
Read. An active low logic level input used to
control the reading of data from the device into
the host µController.
Write. An active low logic level input used to
control the writing of data into the device from the
host µController.
The negative supply rail (ground).
) Connections to the Rx level measurement.
) circuitry. A capacitor should be connected
) from each pin to V_SS.
A bias line for the internal circuitry, held at ½ V_DD.
This pin must be decoupled to V_SS by a capacitor
mounted close to the device pins.
The output of the Rx input amplifier and the input
to the Rx filter.
The input to the Rx input amplifier.
No internal connection, do not use.
© 2001 Consumer Microcircuits Limited
4
D/989/2