MC9S12E256VFUE Freescale Semiconductor, MC9S12E256VFUE Datasheet - Page 354
MC9S12E256VFUE
Manufacturer Part Number
MC9S12E256VFUE
Description
IC MCU 256K FLASH 25MHZ 80-QFP
Manufacturer
Freescale Semiconductor
Series
HCS12r
Datasheet
1.MC9S12E256CFUE.pdf
(602 pages)
Specifications of MC9S12E256VFUE
Core Processor
HCS12
Core Size
16-Bit
Speed
25MHz
Connectivity
EBI/EMI, I²C, SCI, SPI
Peripherals
POR, PWM, WDT
Number Of I /o
60
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
2.35 V ~ 2.75 V
Data Converters
A/D 16x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
80-QFP
Processor Series
S12E
Core
HCS12
Data Bus Width
16 bit
Data Ram Size
16 KB
Interface Type
I2C, SCI, SPI
Maximum Clock Frequency
50 MHz
Number Of Programmable I/os
60
Number Of Timers
12
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWHCS12
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 16 Channel
On-chip Dac
8 bit, 2 Channel
Package
80PQFP
Family Name
HCS12
Maximum Speed
50 MHz
For Use With
M68EVB912E128 - BOARD EVAL FOR MC9S12E128/64
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC9S12E256VFUE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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Chapter 11 Pulse Width Modulator with Fault Protection (PMF15B6CV2)
11.4.3.2
A PWM period is determined by the value written to the PWM counter modulo register.
The PWM counter is an up/down counter in a center-aligned operation. In this mode the PWM highest
output resolution is two bus clock cycles.
354
PWM period = (PWM modulus) (PWM clock period) 2
Period
PWM PERIOD = 8 x PWM CLOCK PERIOD
Because of the equals-comparator architecture of this PMF, the modulus
equals zero case is considered illegal. Therefore, the modulus register does
not return to zero, and a modulus value of zero will result in waveforms
inconsistent with the other modulus waveforms. If a modulus of zero is
loaded, the counter will continually count down from $7FFF. This operation
will not be tested or guaranteed. Consider it illegal. However, the dead-time
constraints and fault conditions will still be guaranteed.
ALIGNMENT REFERENCE
DUTY CYCLE = 50%
PWM OUTPUT
MODULUS = 4
UP COUNTER
PWM CLOCK PERIOD
UP/DOWN COUNTER
Figure 11-43. Center-Aligned PWM Period
Figure 11-42. Edge-Aligned PWM Output
MODULUS = 4
MC9S12E256 Data Sheet, Rev. 1.08
COUNT
NOTE
1
2
3
4
3
2
1
0
Freescale Semiconductor
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