mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 171

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

4.3.2.2
The REFDV register provides a finer granularity for the PLL multiplier steps. The count in the reference
divider divides OSCCLK frequency by REFDV + 1.
Read: anytime
Write: anytime except when PLLSEL = 1
4.3.2.3
This register is reserved for factory testing of the CRGV4 module and is not available in normal modes.
Read: always reads 0x0000 in normal modes
Write: unimplemented in normal modes
Freescale Semiconductor
Reset
Reset
W
W
R
R
CRG Reference Divider Register (REFDV)
Reserved Register (CTFLG)
0
0
0
0
7
7
Write to this register initializes the lock detector bit and the track detector
bit.
Writing to this register when in special mode can alter the CRGV4
functionality.
= Unimplemented or Reserved
= Unimplemented or Reserved
0
0
0
0
6
6
Figure 4-5. CRG Reference Divider Register (REFDV)
Figure 4-6. CRG Reserved Register (CTFLG)
MC9S12E256 Data Sheet, Rev. 1.08
0
0
0
0
5
5
NOTE
NOTE
0
0
0
0
4
4
REFDV3
3
0
3
0
0
Chapter 4 Clocks and Reset Generator (CRGV4)
REFDV2
0
0
0
2
2
REFDV1
0
0
0
1
1
REFDV0
0
0
0
0
0
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