S9S12G48F0MLH Freescale Semiconductor, S9S12G48F0MLH Datasheet - Page 660
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S9S12G48F0MLH
Manufacturer Part Number
S9S12G48F0MLH
Description
16-bit Microcontrollers - MCU 16Bit 48KFlash 4096RAM MSCAN
Manufacturer
Freescale Semiconductor
Datasheet
1.S9S12G96F0CLL.pdf
(1292 pages)
Specifications of S9S12G48F0MLH
Rohs
yes
Core
S12
Processor Series
MC9S12G
Data Bus Width
16 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
48 KB
Data Ram Size
2 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
LQFP-64
Mounting Style
SMD/SMT
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Pulse-Width Modulator (S12PWM8B8CV2)
Shown in
19.4.2.7
The scalable PWM timer also has the option of generating up to 8-channels of 8-bits or 4-channels of
16-bits for greater PWM resolution. This 16-bit channel option is achieved through the concatenation of
two 8-bit channels.
The PWMCTL register contains four control bits, each of which is used to concatenate a pair of PWM
channels into one 16-bit channel. Channels 6 and 7 are concatenated with the CON67 bit, channels 4 and
5 are concatenated with the CON45 bit, channels 2 and 3 are concatenated with the CON23 bit, and
channels 0 and 1 are concatenated with the CON01 bit.
When channels 6 and 7 are concatenated, channel 6 registers become the high order bytes of the double
byte channel, as shown in
registers become the high order bytes of the double byte channel. When channels 2 and 3 are concatenated,
channel 2 registers become the high order bytes of the double byte channel. When channels 0 and 1 are
concatenated, channel 0 registers become the high order bytes of the double byte channel.
When using the 16-bit concatenated mode, the clock source is determined by the low order 8-bit channel
clock select control bits. That is channel 7 when channels 6 and 7 are concatenated, channel 5 when
channels 4 and 5 are concatenated, channel 3 when channels 2 and 3 are concatenated, and channel 1 when
channels 0 and 1 are concatenated. The resulting PWM is output to the pins of the corresponding low order
8-bit channel as also shown in
PPOLx bit of the corresponding low order 8-bit channel as well.
662
E = 100 ns
Clock Source = E, where E = 10 MHz (100 ns period)
Figure 19-20
PPOLx = 0
PWMPERx = 4
PWMDTYx = 1
PWMx Frequency = 10 MHz/8 = 1.25 MHz
PWMx Period = 800 ns
PWMx Duty Cycle = 3/4 *100% = 75%
PWM 16-Bit Functions
Change these bits only when both corresponding channels are disabled.
Figure 19-20. PWM Center Aligned Output Example Waveform
is the output waveform generated.
Figure
Figure
MC9S12G Family Reference Manual,
19-21. Similarly, when channels 4 and 5 are concatenated, channel 4
19-21. The polarity of the resulting PWM output is controlled by the
DUTY CYCLE = 75%
PERIOD = 800 ns
NOTE
Rev.1.23
Freescale Semiconductor
E = 100 ns
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