MC9S12P96CFT Freescale Semiconductor, MC9S12P96CFT Datasheet - Page 357
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MC9S12P96CFT
Manufacturer Part Number
MC9S12P96CFT
Description
MCU 16BIT 96K FLASH 48-QFN
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet
1.S9S12P32J0MFT.pdf
(566 pages)
Specifications of MC9S12P96CFT
Core Processor
HCS12
Core Size
16-Bit
Speed
32MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
34
Program Memory Size
96KB (96K x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
6K x 8
Voltage - Supply (vcc/vdd)
1.72 V ~ 5.5 V
Data Converters
A/D 10x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-QFN Exposed Pad
Processor Series
S12P
Core
HCS12
3rd Party Development Tools
EWHCS12
Development Tools By Supplier
KIT33812ECUEVME, DEMO9S12PFAME
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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between the PWM counter and the period register behaves differently depending on what output mode is
selected as shown in
Section 10.4.2.6, “Center Aligned Outputs.”
Each channel counter can be read at anytime without affecting the count or the operation of the PWM
channel.
Any value written to the counter causes the counter to reset to 0x0000, the counter direction to be set to
up, the immediate load of both duty and period registers with values from the buffers, and the output to
change according to the polarity bit. When the channel is disabled (PWMEx = 0), the counter stops. When
a channel becomes enabled (PWMEx = 1), the associated PWM counter continues from the count in the
PWMCNTx register. This allows the waveform to resume when the channel is re-enabled. When the
channel is disabled, writing 0 to the period register will cause the counter to reset on the next selected
clock.
Generally, writes to the counter are done prior to enabling a channel to start from a known state. However,
writing a counter can also be done while the PWM channel is enabled (counting). The effect is similar to
writing the counter when the channel is disabled except that the new period is started immediately with
the output set according to the polarity bit.
The counter is cleared at the end of the effective period (see
Section 10.4.2.6, “Center Aligned Outputs,”
10.4.2.5
The PWM timer provides the choice of two types of outputs, left aligned or center aligned outputs. They
are selected with the CAEx bits in the PWMCAE register. If the CAEx bit is cleared (CAEx = 0), the
corresponding PWM output will be left aligned.
In left aligned output mode, the 8-bit counter is configured as an up counter only. It compares to two
registers, a duty register and a period register as shown in the block diagram in
Freescale Semiconductor
When PWMCNTx register
written to any value
Effective period ends
Left Aligned Outputs
Counter Clears (0x0000)
If the user wants to start a new “clean” PWM waveform without any
“history” from the old waveform, the user must write to channel counter
(PWMCNTx) prior to enabling the PWM channel (PWMEx = 1).
Writing to the counter while the channel is enabled can cause an irregular
PWM cycle to occur.
Figure 10-35
Table 10-11. PWM Timer Counter Conditions
S12P-Family Reference Manual, Rev. 1.13
and described in
When PWM channel is
enabled (PWMEx = 1). Counts
from last value in PWMCNTx.
for more details).
Counter Counts
NOTE
NOTE
Section 10.4.2.5, “Left Aligned Outputs,”
Section 10.4.2.5, “Left Aligned Outputs,”
Pulse-Width Modulator (PWM8B6CV1) Block Description
When PWM channel is
disabled (PWMEx = 0)
Counter Stops
Figure
10-35. When the
and
and
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