Osc Offset Contorol ( Reg -C / Bank 3 ) - Epson RX-4803SA/LC Applications Manual

RX - 4803 SA / LC

8.2.8. OSC Offset Contorol ( Reg -C / Bank 3 )

Address
C
1) OFS bits (OFS3-OFS0)
The offset adjustment is done to the oscillation frequency.
OFS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
*The OFS register affects the frequency stability. Please refer to a lower graph.
Please be careful if you offset and adjust it.
The offset function is effective for frequency adjustment at the normal temperature.
20
15
10
-5
-10
-15
-20
Function bit 7
OSC Offset 
OFS2 OFS1 OFS0
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
Frequency Stability vs. Temperature vs. OSC Offset Value
(Typ_data)
5
0
-40 -15 10
Temperature [℃]
bit 6 bit 5 bit 4
  
Adjust value ( x 10
RX-4803SA RX-4803LC
± 0.0
0
−0.6
1
−1.2
0
−1.8
1
−2.4
0
−3.0
1
−3.6
0
−4.2
1
0 +4.8
1 +4.2
0 +3.6
1 +3.0
0 +2.4
1 +1.8
0 +1.2
1 +0.6
OSC_Offset:08h
OSC_Offset:00h
OSC_Offset:07h
35 60
Page - 14
bit 3 bit 2 bit 1
OFS3 OFS2 OFS1
-6
)
± 0.0
−0.7
−1.4
−2.1
−2.8
−3.5
−4.2
−4.9
+5.6
+4.9
+4.2
+3.5
+2.8
+2.1
+1.4
+0.7
85
ETM33E-04
bit 0
OFS0