MC9S12P32MFT Freescale Semiconductor, MC9S12P32MFT Datasheet - Page 237
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MC9S12P32MFT
Manufacturer Part Number
MC9S12P32MFT
Description
16-bit Microcontrollers - MCU 16 BIT 32K FLASH
Manufacturer
Freescale Semiconductor
Datasheet
1.MC9S12P64VQK.pdf
(566 pages)
Specifications of MC9S12P32MFT
Rohs
yes
Core
S12
Processor Series
MC9S12P
Data Bus Width
16 bit
Maximum Clock Frequency
32 MHz
Program Memory Size
32 KB
Data Ram Size
4 KB
On-chip Adc
Yes
Operating Supply Voltage
3.13 V to 5.5 V
Operating Temperature Range
- 40 C to + 125 C
Package / Case
QFN-48
Mounting Style
SMD/SMT
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7.4
7.4.1
The PLL is used to generate a high speed PLLCLK based on a low frequency REFCLK.
The REFCLK is by default the IRCCLK which is trimmed to f
If using the oscillator (OSCE=1) REFCLK will be based on OSCCLK. For increased flexibility, OSCCLK
can be divided in a range of 1 to 16 to generate the reference frequency REFCLK using the REFDIV[3:0]
bits. Based on the SYNDIV[5:0] bits the PLL generates the VCOCLK by multiplying the reference clock
by a 2, 4, 6,... 126, 128. Based on the POSTDIV[4:0] bits the VCOCLK can be divided in a range of 1,2,
3, 4, 5, 6,... to 32 to generate the PLLCLK.
Freescale Semiconductor
.
If oscillator is enabled (OSCE=1)
If oscillator is disabled (OSCE=0)
f VCO
If PLL is locked (LOCK=1)
If PLL is not locked (LOCK=0)
If PLL is selected (PLLSEL=1)
Functional Description
=
Phase Locked Loop with Internal Filter (PLL)
2 f REF
×
Although it is possible to set the dividers to command a very high clock
frequency, do not exceed the specified bus frequency limit for the MCU.
×
(
SYNDIV
+
f PLL
f bus
1
f PLL
S12P-Family Reference Manual, Rev. 1.13
)
=
=
=
f REF
f REF
f PLL
------------ -
---------------------------------------- -
(
f VCO
---------------
POSTDIV
2
4
=
=
f VCO
------------------------------------
(
f IRC1M
REFDIV
NOTE
f OSC
+
1
)
+
1
S12 Clock, Reset and Power Management Unit (S12CPMU)
)
IRC1M_TRIM
=1MHz.
237
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