mc68hc908lb8 Freescale Semiconductor, Inc, mc68hc908lb8 Datasheet - Page 109

• Manufacturer Part Number: mc68hc908lb8
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

10.8.6 Frequency Dithering Control Register
This read/write register selects the clock source for the dithering controller, and selects the number of
dithering steps and modulus value of the dithering counter.
CLKSRC — Dithering Clock Source
SEL[2:0] — Dithering Step/Modulus Select
Freescale Semiconductor
This read/write bit selects the clock source for the 5-bit dithering counter.
These read/write bits select the number of steps used by the dithering counter and set the scaling
factor for the STEP[4:0] bits.
1 = The dithering counter is clocked from the 16-bit timebase
0 = The dithering counter is clocked from the output of the dual frequency generator counter
Address: $0059
Reset:
Read:
Write:
Figure 10-15. Frequency Dithering Control Register (HRPDCR)
NOTES:
1. No dithering occurs for this setting.
SEL[2:0]
CLKSEL
5
Bit 15
0
1
2
3
4
6
7
(1)
0
1
= Unimplemented
14
Dual Frequency Generator
Number of Steps
MC68HC908LB8 Data Sheet, Rev. 1
16 bit timebase
Clock Source
Reserved
Reserved
32
16
13
8
4
2
0
Table 10-5
Table 10-6
12
CLKSRC
11
0
Divide STEP[4:0] by...
HRPTBH:HRPTBL
------------------------------------------------- -
Reserved
Reserved
Timebase
SEL2
------------------------- -
HRPCLK
HRPCLK
P(10:0)
10
0
16
32
1
2
4
8
SEL1
9
0
SEL0
Bit 8
0
HRP Registers
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