mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 150

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Clock, Reset and Power Management (S12CPMU_UHV)
4.3.2.16
The CPMUACLKTR register configures the trimming of the Autonomous Clock (ACLK - trimmable
internal RC-Oscillator) which can be selected as clock source for some CPMU features
Read: Anytime
Write: Anytime
150
0x02F3
ACLKTR[5:0]
After de-assert of System Reset a value is automatically loaded from the Flash memory.
Reset
Field
7–2
W
R
ACLKTR5
Autonomous Clock Period Trimming Bits — See
represents a signed number influencing the ACLK period time.
Autonomous Clock Trimming Register (CPMUACLKTR)
F
7
Figure 4-21. Autonomous Clock Trimming Register (CPMUACLKTR)
ACLKTR4
ACLKTR[5]
ACLKTR[4]
ACLKTR[3]
ACLKTR[2]
ACLKTR[1]
ACLKTR[0]
F
6
Bit
Table 4-18. CPMUAPITR Field Descriptions
MC9S12VR Family Reference Manual,
Preliminary - Subject to Change Without Notice
ACLKTR3
Table 4-19. Trimming Effect of APITR
Increases period
Decreases period less than ACLKTR[5] increased it
Decreases period less than ACLKTR[4]
Decreases period less than ACLKTR[3]
Decreases period less than ACLKTR[2]
Decreases period less than ACLKTR[1]
F
5
ACLKTR2
F
4
Trimming Effect
Description
Table 4-19
ACLKTR1
F
3
for trimming effects. The ACLKTR[5:0] value
Rev. 2.2
ACLKTR0
F
2
Freescale Semiconductor
0
0
1
.
0
0
0