LV23401V_11 Datasheet, PDF (13/24 Pages) Sanyo Semicon Device – For Home Stereo System 1-chip Tuner IC Incorporating PLL

3) Description of the Register of LV23401
LV23401V
Register 00h – CHIP_ID – Chip identify register (Read-Only)
7
6
5
4
3
2
1
0
ID[7:0]
Bit 7-0 :
ID[7:0] : 8-bit CHIP ID.
LV23400 : 18h
Note : To abort the command, write any value in this register.
Register 01h – CHIP_REV – Chip Revision identify resister (Read-Only)
7
6
5
4
3
2
1
0
Revision[7:0]
Bit 7-0 :
ID[7:0] : 8-bit Chip revision
ES1 : 00h
Note : To abort the command, write any value in this register.
Register 02h – RADIO_STAT – Radio station status (Read-Only)
7
6
5
4
3
2
1
0
IM_STAT
IM_FS[1:0]
MO_ST
FS[2:0]
TUNED
Bit 7 :
IM_STAT : State of image evasion code
0 = Eternal operation (It is possible to write it.)
1 = The image evasion is being processed. (Writing is improper.)
Note : This bit operates only when Resister 14h_bit7 (IM_EVAS) is set to "1". The data writing processing to LV23401 when this bit is "1" is prohibited.
Bit 6 - 5 :
IM_FS : Image bureau electric field strength
0 : Image bureau none
1:0
2 : 0dB to 10dB compared with the hope bureau.
3 : The level of the image bureau is +10dB or more stronger than that of the hope bureau.
Bit 4 :
MO_ST : MONAURAL/STEREO display
0 = Stereo reception (Compelling the monaural setting is also the same.)
1 = Receiving in stereo mode.
Bit 3 - 1 :
FS[2:0] : Field strength
0 : Field strength < 10dBμV
1 : Field strength 10 to 20dBμV
2 : Field strength 20 to 30dBμV
•••
3 : Field strength > 70dBμV
Bit 0 :
TUNED : Radio-tuning flag
0 = No tuning.
1 = The tuning.
Note : When the frequency tuning succeeds, this bit is set. This flag is cleared under the following three conditions.
1. PW_RAD = 0
2. Do the tuning of the frequency.
3. When FLL becomes outside the correction range
Only when the TUNED flag is changed from one into 0, the RAD_IF interrupt flag is set.
When the status of TUNED changes from 0 into one, the interrupt is not generated.
Register 04h – TNPL – Tune position low (Read-Only)
7
6
5
4
3
2
1
0
TUNEPOS[7:0]
Bit 7-0 :
TUNEPOS[7:0] : Current RF frequency (Low 8bit)
No.A1746-13/24