Z02215
Single Chip Modem with Integrated Controller, Data Pump, and AFE
6
Table 1. Pin Descriptions
PLCC LQFP
Pin # Pin #
Symbol
Function
Direction Description
RESET
1
28
Reset (Active Input,
The RESET signal sets the modem to a RESET
state.
low)
Output
V
2
3
4
29
30
31
Digital Power
Digital Ground
DD
D
GND
XTAL
EXTAL
TEST
Crystal
(Time-based
Output)
Output
Input
This pin connects a parallel-resonant crystal.
This pin is left open if an external clock is used
instead of a crystal.
5
6
32
33
Crystal
(Time-based
Output)
This pin connects a parallel-resonant crystal.
An external clock can be input to the device on
this pin when a crystal is not used.
Input
This pin is a test pin that must be tied to digital
ground.
AV
7
8
34
35
Analog Power
DD
TXO+
Transmit
Analog
Output
The TXO+ is capable of driving a 600W
resistive load over a leased line or public
switched telephone network via a Data Access
Arrangement (DAA).
Differential
Analog Output
Positive
TXO–
9
36
Transmit
Analog
Output
The TXO+ is capable of driving a 600W
resistive load over a leased line or public
switched telephone network via a Data Access
Arrangement (DAA).
Differential
Analog Output
Negative
A
V
10
11
37
38
Analog Ground
Reference
GND
REF
Analog
An internally generated DC voltage.
Voltage active Output
High
A
12
13
39
40
Analog Ground
GND
CF1
CF2
RXI–
Integration
Capacitor PIN 1 Input
Analog
Connect an 82pF capacitor between CF2 and
CF1 to complete the internal feedback
integration filter for improved analog A/D
performance.
14
15
41
42
Integration
Capacitor PIN 2 Input
Analog
Connect an 82pF capacitor between CF2 and
CF1 to complete the internal feedback
integration filter for improved analog A/D
performance.
Receive
Analog
Input
These are the analog inputs from the DAA.
Differential
Analog Output
Negative
PS001907-0904
Pin Descriptions
ZILOG [ ZILOG, INC. ]
