[AK1541]
10. Register Functional Description
< Address 1: Num >
D19 D18
D[17:0]
Address
0
0
NUM[17:0]
0001
Note) Writing into address 0x01 is enabled when writing into address 0x02 is performed.
NUM[17:0] : Set the numerator in 2’s complementary representation.
< Address 2: Int >
D19
D[18:15]
D[14:0]
Address
0
CP1[3:0]
INT[14:0]
0010
CP1[3:0]: Sets the current value for the charge pump in normal operation (Charge Pump 1).
The minimum current value for Charge Pump 1 (CP1_min) is determined by the following formula:
CP1_min = 0.285 / Resistance connected to the [BIAS] pin
Charge Pump 1 current = CP1_min x (CP1 setting + 1)
Charge Pump 1 current [µA]
CP1[3:0]
22kΩ
27kΩ
33kΩ
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
13.0
25.9
10.6
21.1
8.6
17.3
25.9
34.5
43.2
51.8
60.5
69.1
77.7
86.4
95.0
103.6
112.3
120.9
129.5
138.2
38.9
31.7
51.8
42.2
64.8
52.8
77.7
63.3
90.7
73.9
103.6
116.6
129.5
142.5
155.5
168.4
181.4
194.3
207.3
84.4
95.0
105.6
116.1
126.7
137.2
147.8
158.3
168.9
INT[14:0] : Sets the integer.
MS1043-E-05
20
2013/03
AKM [ ASAHI KASEI MICROSYSTEMS ]
