tda7421n STMicroelectronics, tda7421n Datasheet - Page 22

• Manufacturer Part Number: tda7421n
• Description: Am/fm Tuner For Car Radio And Hi-fi Applications
• Manufacturer: STMicroelectronics

TDA7421N
CONTROL REGISTER FUNCTION
Figure 6. IF Counter Block Diagram
22/38
REGISTER NAME
IFENA
IF-AM
IF-FM
OSC
LPIN1/2
CURRH
LDENA
IFENA
IFCM
IRC
EW
IFS
RC
PM
PC
CF
D
A
B
Programmable Counter for VCO Frequency
Reference Counter PLL
Reference Counter IF
IF Counter Mode
Frequency Error Window
Enable IF Counter
Center Frequency IF Counter
Sampling Time IF Counter
Stby, FM, AM, AM swallow mode (PLL Mode)
Programmable Delay for Lock Detector
Loop Filter Input Select
Charge Pump High Current
Charge Pump Low Current
Lock Detector Enable
Set Current High
14 BIT COUNTER
IFC-REGISTER
3 BIT COUNTER
IFS-REGISTER
CF-REGISTER
11-21 BIT COUNTER
FUNCTION
D97AU809
EW-REGISTER
ZD
UP/DOWN COUNTER