AK2365 Datasheet, PDF (20/31 Pages) Asahi Kasei Microsystems – dPMR Filterless IF LSI

[AK2365]
LOFREQ[1:0]: Local frequency setting
LOFREQ
[1]
LOFREQ
[0]
Local frequency
0
0
45.9MHz
0
1
50.4MHz
1
0
57.6MHz
Note: Do no set the combination of the code which is not defined in the table given above.
Address 0x02 (Control Register 2)
Name
D7(MSB) D6
D5
D4
D3
D2
D1 D0(LSB)
Control Register 2
Reserved
AGC_TIME[1:0] ^AGC1_S CAL
TEP
Initial Value
0
0
1
1
0
0
1
0
AGC_TIME[1:0]: AGC response time setting
This register set response time for AGC1 gain and AGC2 gain to change by 1step.
AGC_TIME AGC_TIME
[1]
[0]
AGC response time [ms]
AGC1_STEP=0 setting
AGC1_STEP=1 setting
State A State B
State C
State A
State B
State C
0
0
0.56
8.50
8.50
0.38
4.35
4.35
0
1
0.92
8.79
8.79
0.56
4.50
4.50
1
0
1.64
9.37
9.37
0.93
4.79
4.79
1
1
3.08
10.52
10.52
1.66
5.38
5.38
Note 1: Values above indicate response time during AGC gain changes from maximum to minimum or
from minimum to maximum.
State A: AGC1 output level is beyond the upper limit.
State B: AGC1 output level is within the upper limit and AGC2 output level is beyond the upper limit.
State C: AGC2 output level is under the lower limit.
Data
Function
AGC1_ST
EP
CAL
AGC1 gain switching
range setting
Discriminator circuit
calibration start
trigger (Note2)
0
±1dB
Operation
1
±2dB
Invalid
Start
Notes
Note 2: calibration is performed synchronized with the rising edge of {CAL}. After calibration is
completed, this register is set to “0” automatically. It takes 1.3ms before calibration is completed.
Refer to “calibration procedure” for further information.
MS1453-E-01
- 20 -
2012/10