ZL50022
Data Sheet
External Read/Write Address: 0041H
Reset Value: 0000H
15
0
14
0
13
0
12
0
11
10
9
8
7
6
5
4
3
2
1
0
R3F2
R3F1
R3F0
R2F2
R2F1
R2F0
R1F2
R1F1
R1F0
R0F2
R0F1
R0F0
Bit
Name
Description
15-12
Unused
Reserved
In normal functional mode, these bits MUST be set to zero.
11 - 9
R3F2 - 0
Reference 3 Frequency Bits
When the RFRE bit of the DPLLCR register is high, these bits are used to select the
REF3 input frequency. When the RFRE bit is low, these bits are ignored.
R3F2
R3F1
R3F0
REF 3 Input Frequency
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
8 kHz
1.544 MHz
2.048 MHz
4.096 MHz
8.192 MHz
16.384 MHz
19.44 MHz
Reserved
8 - 6
R2F2 - 0
Reference 2 Frequency Bits: When the RFRE bit of the DPLLCR register is high, these
bits are used to select the REF2 input frequency. When the RFRE bit is low, these bits
are ignored.
R2F2
R2F1
R2F0
REF 2 Input Frequency
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
8 kHz
1.544 MHz
2.048 MHz
4.096 MHz
8.192 MHz
16.384 MHz
19.44 MHz
Reserved
Table 29 - Reference Frequency Register (RFR) Bits
64
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
