LV24100LP Datasheet, PDF (13/18 Pages) Sanyo Semicon Device – Bi-CMOS IC FM and AM Tuner IC for Small Portable Equipment

LV24100LP
Block 1, Register 0Eh-IRQ_ID-Interrupt Identify Register(Read-only)
7
6
5
4
3
2
1
Reserved
II_CNT2
Reserved
II_AFC
Reserved
Bit 7:
Bit 6:
Bit 5:
Bit 4:
Bit 3:
Bit 2:
Bit 1:
Bit 0:
Reserved: should be read as 1
Reserved: should be read as 1
II_CNT2: Counter 2 counting done flag
0 = No counting 2 counting done interrupt
1 = Measuring with counter 2 is done
Reserved: should be read as 0
II_AFC: AFC out of range interrupt bit
0 = No AFC interrupt
1 = AFC fails to hold the RF-frequency in range
Reserved: should be read as 0
Reserved: should be read as 0
II_FS_MS: Field strength and Mono/stereo interrupt bit
0 = No change in either the field strength or the mono/stereo mode
1 = Change in field strength bits detected or mono/stereo mode has changed
0
II_FS_MS
Block 1, Register 0Fh-IRQ_OUT-Set Interrupt Out Register(Write Only)
7
6
5
4
3
2
1
0
IRQO_VAL[7:0]
Bit 7-0:
IRQO_VAL[7:0]: Write any value to this register will select the interrupt as output
on the DATA-line of the LV24100 (the DATA-line can then be used as interrupt pin)
Block 2, Register 02h-RADIO_CTRL1-Radio Control 1 Register(Write-only)
7
6
5
4
3
2
1
0
EN_MEAS
EN_AFC
Reserved
AM_CD2
DIR_AFC
RST_AFC
AM_CD1
AM_CD0
Bit 7:
EN_MEAS: Enable measurement bit
0 = Normal mode
1 = Measurement mode
Bit 6:
EN_AFC: Enable AFC bit
0 = Disable AFC
1 = Enable AFC
Bit 5:
EN_RF16:Enable RF16 Divider bit
0 = Disable RF16
1 = Enable RF16
Bit 4:
AM_CD2: AM clock divider bit 2. Should be kept at 1 in FM mode
Bit 3:
DIR_AFC: AFC direction bit
0 = AFC normal direction
1 = AFC reverse direction (for test purpose)
Bit 2:
RST_AFC: Reset AFC bit
0 = Normal operation
1 = Reset AFC to the middle of the control range
Bit 1:
AM_CD1: AM clock divider bit 1. Should be kept at 1 in FM mode
Bit 0:
AM_CD0: AM clock divider bit 0. Should be kept at 1 in FM mode
Note: The AM_CD[2:0] bits are used to scale the FM-RF frequency down to AM-RF frequency. In FM mode, the AM divider should be turned off.
AM_CD[2:0]
0
1
2
3
4
5
6
7
Divider factor
48
64
80
96
128
160
192
Divider OFF
Approx. AM-RF (in kHz)
1354
2291
1015
1718
812
1375
677
1145
507
859
406
687
338
572
Block 2, Register 03h-IFCEN_OSC-IF Center Frequency Oscillator Register(Write-only)
7
6
5
4
3
2
1
0
IFCOSC[7:0]
Bit 7-0:
IFCENT[7:0]: value for centering the IF frequency
No.A0194-13/18