A96G140/A96G148/A96A148 User’s manual
8. Clock generator
85
XTFLSR (Main Crystal OSC Filter Selection Register): 1038H
7
6
5
4
3
2
1
0
NFSEL1
NFSEL0
MX_FIL_DIS
MX_ISEL1
MX_ISEL0
SUB_FIL_DIS
SUB_ISEL1
SUB_ISEL0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value: 00H
NFSEL[1:0]
Noise Filter Selective Option
NFSEL1
NFSEL0
Description
0
0
18ns (Default, 12MHz)
0
1
22ns (12MHz)
1
0
26ns (8MHz)
1
1
30ns (4MHz)
MX_FIL_DIS
Main X-TAL noise canceller selection.
0
Using noise filter
1
Bypass noise filter
MX_ISEL[1:0]
Current selective option for MX-TAL
MX_ISEL1
MX_ISEL0
Description
0
0
HIGH (~12M)
0
1
MID-HIGH (8~12M)
1
0
MID-LOW (4~8M)
1
1
LOW (~4M)
SUB_FIL_DIS
SUB X-TAL noise canceller selection.
0
Using noise filter
1
Bypass noise filter
SUB_ISEL[1:0] Current selective option for SUB-TAL
SUB_ISEL1 SUB_ISEL0 Description
0
0
Low
0
1
Mid-Low
1
0
Mid-High
1
1
High (When using fast Start-up)
NOTE
: The External Main Oscillator Range (XRNS) should be changed while the system clock is selected as IRC