Z02215
Single Chip Modem with Integrated Controller, Data Pump, and AFE
6
Table 1. Pin Descriptions
Symbol
RESET
V
DD
D
GND
XTAL
PLCC LQFP
Pin # Pin #
1
2
3
4
28
29
30
31
Function
Reset (Active
low)
Digital Power
Digital Ground
Crystal
(Time-based
Output)
Crystal
(Time-based
Output)
Output
This pin connects a parallel-resonant crystal.
This pin is left open if an external clock is used
instead of a crystal.
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.
This pin is a test pin that must be tied to digital
ground.
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).
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).
An internally generated DC voltage.
Direction Description
Input,
Output
The RESET signal sets the modem to a RESET
state.
EXTAL
5
32
Input
TEST
AV
DD
TXO+
6
7
8
33
34
35
Analog Power
Transmit
Differential
Analog Output
Positive
Transmit
Differential
Analog Output
Negative
Analog Ground
Reference
Voltage active
High
Analog Ground
Input
Analog
Output
TXO–
9
36
Analog
Output
A
GND
V
REF
10
11
37
38
Analog
Output
A
GND
CF1
12
13
39
40
Integration
Analog
Capacitor PIN 1 Input
Connect an 82pF capacitor between CF2 and
CF1 to complete the internal feedback
integration filter for improved analog A/D
performance.
Connect an 82pF capacitor between CF2 and
CF1 to complete the internal feedback
integration filter for improved analog A/D
performance.
These are the analog inputs from the DAA.
CF2
14
41
Integration
Analog
Capacitor PIN 2 Input
RXI–
15
42
Receive
Differential
Analog Output
Negative
Analog
Input
PS001907-0904
Pin Descriptions
ZILOG [ ZILOG, INC. ]
