mc9s08ac16 Freescale Semiconductor, Inc, mc9s08ac16 Datasheet - Page 75
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mc9s08ac16
Manufacturer Part Number
mc9s08ac16
Description
Hcs08 Microcontrollers 8-bit Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S08AC16.pdf
(338 pages)
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5.9.5
This register is used to control the MCLK clock output.
Freescale Semiconductor
Reset
MCSEL
Field
MPE
2:0
4
W
R
System MCLK Control Register (SMCLK)
MCLK Pin Enable — This bit is used to enable the MCLK function.
0 MCLK output disabled.
1 MCLK output enabled on PTC2 pin.
MCLK Divide Select — These bits are used to select the divide ratio for the MCLK output according to the
formula below when the MCSEL bits are not equal to all zeroes. In the case that the MCSEL bits are all zero and
MPE is set, the pin is driven low. See
0
0
7
= Unimplemented or Reserved
MCLK frequency = Bus Clock frequency ÷ (2 * MCSEL)
0
0
6
Figure 5-6. System MCLK Control Register (SMCLK)
Table 5-7. SMCLK Register Field Descriptions
MC9S08AC16 Series Data Sheet, Rev. 0
0
0
5
Equation
PRELIMINARY
MPE
0
4
5-1.
Description
Chapter 5 Resets, Interrupts, and System Configuration
3
0
0
0
2
MCSEL
0
1
Eqn. 5-1
0
0
75
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