Z02215
Single Chip Modem with Integrated Controller, Data Pump, and AFE
7
Table 1. Pin Descriptions (Continued)
PLCC LQFP
Pin # Pin #
Symbol
Function
Direction Description
RXI+
16
43
Receive
Analog
Input
These are the analog inputs from the DAA.
Differential
Analog Output
Positive
AV
17
44
1
Analog Power
DD
2
EE_DATA 18
Input/
I C EEPROM Data.
Output
2
EE_CLK 19
2
3
Output
I C EEPROM Clock.
MUTE
20
21
Speaker Mute Output
Control
Controls speaker muting.
RDET/
LCS
4
Ring Detect
Input Line
Current Sense
Input
Signals the presence of a ring signal on the
line.The LCS_CHK input is used to detect when
a parallel phone is off-hook before dialing or
when a parallel phone has been picked up while
connected. In either case when LCS goes Low,
the connection attempt is dropped with a NO
CARRIER message.
V
22
23
5
6
7
Digital Power
Digital Ground
Output
Output
DD
D
GND
LCS_CHK 24
Line Current
Sense
This signal is used to enable the Line Current
Sense circuits in the DAA when checking for
parallel phone off-hook condition prior to taking
the phone line off-hook.
CID
25
8
9
Caller ID Relay Output
This signal is used to turn on the Caller ID relay
in the DAA.
SHTREL 26
Pulse Dial
Shunt Relay
Output
Output
SHTREL works in conjunction with pulse dial
make/break. It offers extra-low resistance
across the tip and ring. When all relays are
closed, SHRTEL provides 100 Ohms (Low)
instead of 600 Ohms.
OH
27
28
10
11
Off-Hook Relay Output
Output
This signal is used to turn on the off-hook relay
in the DAA.
D
Digital Ground
GND
PS001907-0904
Pin Descriptions
ZILOG [ ZILOG, INC. ]
