mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 257

• Manufacturer Part Number: mc68hc908jb16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

13.9.3 VCO and Reference Divider Select Registers High
MC68HC908JB16
Freescale Semiconductor
NOTE:
—
Rev. 1.1
Address:
Address:
Reset:
Reset:
The VCO and reference divider select registers high (PNRH1 and
PNRH2) contain the programming information for the high byte of VCO
feedback divider, N, and reference divider, R.
VDSx_[11:8] — VCO Divider Select Bits
RDSx_[9:8] — Reference Divider Select Bits
The VDSx_[11:8] and RDSx_[9:8] bits are not latched until the
respective low bytes are written.
Read:
Read:
Write:
Write:
Figure 13-8. PLL1 N & R Divider Select Register High (PNRH1)
Figure 13-9. PLL2 N & R Divider Select Register High (PNRH2)
These read/write bits control the high byte of the VCO feedback
divider, N.
These read/write bits control the high byte of the reference divider, R.
VDS1_11 VDS1_10
VDS2_11 VDS2_10
$0053
$0056
Bit 7
Bit 7
0
0
Clock Generator Module (CGM)
= Unimplemented
= Unimplemented
6
0
6
0
VDS1_9
VDS2_9
5
1
5
1
VDS1_8
VDS2_8
4
4
0
0
3
0
0
3
0
0
Clock Generator Module (CGM)
2
0
0
2
0
0
RDS1_9
RDS2_9
1
0
1
0
Technical Data
RDS1_8
RDS2_8
Bit 0
Bit 0
0
0
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