K60P100M100SF2RM Datasheet, PDF (900/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Memory Map and Register Definition
VREF memory map
Absolute
address
(hex)
Register name
Width
(in bits)
Access
Reset value
4007_4000 VREF Trim Register (VREF_TRM)
8
R/W Undefined
4007_4001 VREF Status and Control Register (VREF_SC)
8
R/W
00h
Section/
page
37.2.1/
900
37.2.2/
901
37.2.1 VREF Trim Register (VREF_TRM)
This register contains bits that contain the trim data for the Voltage Reference.
Address: VREF_TRM is 4007_4000h base + 0h offset = 4007_4000h
Bit
7
6
5
4
3
2
1
0
Read
0
Reserved
Write
TRIM
Reset
x*
x*
x*
x*
x*
x*
x*
x*
* Notes:
• x = Undefined at reset.
Field
7
Reserved
6
Reserved
5–0
TRIM
VREF_TRM field descriptions
Description
This field is reserved.
Upon reset this value is loaded with a factory trim value.
This bit must always be written with the original reset value.
This read-only field is reserved and always has the value zero.
Trim bits
Upon reset this value is loaded with a factory trim value.
These bits change the resulting VREF by approximately ± 0.5 mV for each step.
NOTE: Min = minimum and max = maximum voltage reference output. For minimum and maximum
voltage reference output values, refer to the Data Sheet for this chip.
000000 Min
....
....
111111 Max
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
900
Freescale Semiconductor, Inc.