![NXP Semiconductors Kinetis KE1xZ256 Reference Manual Download Page 394](http://html1.mh-extra.com/html/nxp-semiconductors/kinetis-ke1xz256/kinetis-ke1xz256_reference-manual_1721813394.webp)
18.3.16 Fast IRC Trim Configuration Register (SCG_FIRCTCFG)
The FIRCTCFG register cannot be changed when Fast IRC tuning is enabled. When the
Fast IRC tuning is enabled, writes to this register are ignored, and there is no transfer
error.
Address: 4006_4000h base + 30Ch offset = 4006_430Ch
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SCG_FIRCTCFG field descriptions
Field
Description
31–16
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
15–11
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
10–8
TRIMDIV
Fast IRC Trim Predivide
Divide the System OSC down for Fast IRC trimming.
000
Divide by 1
001
Divide by 128
010
Divide by 256
011
Divide by 512
100
Divide by 1024
101
Divide by 2048
110
Reserved. Writing this value will result in Divide by 1.
111
Reserved. Writing this value will result in a Divide by 1.
7–2
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
TRIMSRC
Trim Source
Configures the external clock source to tune the Fast IRC. TRMSRC must be configured before
programming FIRCSTAT register for trim update
00
Reserved
01
Reserved
10
System OSC
11
Reserved
Memory Map/Register Definition
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
394
NXP Semiconductors
Summary of Contents for Kinetis KE1xZ256
Page 2: ...Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 2 NXP Semiconductors...
Page 178: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 178 NXP Semiconductors...
Page 356: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 356 NXP Semiconductors...
Page 410: ...Interrupts Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 410 NXP Semiconductors...
Page 604: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 604 NXP Semiconductors...
Page 634: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 634 NXP Semiconductors...
Page 674: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 674 NXP Semiconductors...
Page 820: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 820 NXP Semiconductors...
Page 1030: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1030 NXP Semiconductors...
Page 1052: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1052 NXP Semiconductors...
Page 1066: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1066 NXP Semiconductors...
Page 1268: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1268 NXP Semiconductors...
Page 1314: ...Usage Guide Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1314 NXP Semiconductors...
Page 1316: ...Kinetis KE1xZ256 Sub Family Reference Manual Rev 3 07 2018 1316 NXP Semiconductors...