w91030b Winbond Electronics Corp America, w91030b Datasheet - Page 5

• Manufacturer Part Number: w91030b
• Description: Calling Line Identifier
• Manufacturer: Winbond Electronics Corp America

SYSTEM DIAGRAM
The W91030B device applications include telephone systems which have caller ID features and
which can display the calling message on an LCD display. Figure 5 shows the system diagram. It
illustrates how to use the chip to connect between the tip/ring and the microcontroller in the telephone
system. The ring signal is detected by the W91030B device and then an interrupt sent to the
microcontroller. The ring detected signal will also be directed to the ringer circuit. The data can be
decoded by the microcontroller and displayed on the LCD display. The DTMF ACK signal can also be
generated by the DTMF generator if a call on waiting is performed. Other functions are the same as
the telephone set.
BLOCK DIAGRAM
GCFB
SLEEP/
RESET
VREF
CAP
VDD
VSS
INN
INP
Tip
+
-
Ring
Bias Voltage
Generator
OSCI OSCO
Input Pre-processor
Clock Driver
Oscillator
&
To internal
Interface
circuit
Line
To internal
Anti-alias
circuit
Filter
Figure 5. System Diagram for Caller ID Application
Figure 6. The Block Diagram of W91030B
(W91030B)
Caller ID
Winbond
High Tone
Low Tone
Bandpass
Bandpass
FSK Bandpass
Filter
Filter
Filter
Power down control
LCD Display
- 5 -
FSK Demodulation Circuit
Dual Tone Alert Signal Detection Circuit
Controller
High Tone
Low Tone
Micro
Detector
Detector
Generator
RNGDI
DTMF
Power down control
Demodulator
FSK Carrier
Keypads
Detector
FSK
Ring Detector
RNGRC
Preliminary W91030B
Ringer
FSKE
Circuit
Publication Release Date: March 2000
Guard
Time
Data Output
Handset
Speaker
Interface
FSK
RNGON
MODE
Generator
Interrupt
FCDN
INTN
ALGR
ALGO
ALGRC
DCLK
DATA
FDRN
Revision A1