MM912F634DV1AER2 Freescale Semiconductor, MM912F634DV1AER2 Datasheet - Page 98
![no-image](/images/manufacturer_photos/0/2/262/freescale_semiconductor_sml.jpg)
MM912F634DV1AER2
Manufacturer Part Number
MM912F634DV1AER2
Description
16-bit Microcontrollers - MCU DUAL LS/HS SWITCH W. LIN
Manufacturer
Freescale Semiconductor
Datasheet
1.MM912G634DV1AE.pdf
(338 pages)
Specifications of MM912F634DV1AER2
Rohs
yes
Core
HCS12
Processor Series
MM912F634
Data Bus Width
16 bit
Maximum Clock Frequency
20 MHz
Program Memory Size
32 KB
Data Ram Size
2 KB
On-chip Adc
Yes
Operating Supply Voltage
4.5 V to 5.5 V
Operating Temperature Range
- 40 C to + 105 C
Package / Case
LQFP-48
Mounting Style
SMD/SMT
A/d Bit Size
10 bit
A/d Channels Available
15
Interface Type
SPI
Maximum Operating Temperature
+ 105 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
6
Number Of Timers
1
Program Memory Type
Flash
Supply Voltage - Max
4.5 V
Supply Voltage - Min
4.5 V
- Current page: 98 of 338
- Download datasheet (3Mb)
Note:
Functional Description and Application Information
4.13.3.7
There is a dedicated duty register for each channel. The value in this register determines the duty of the associated PWM
channel. The duty value is compared to the counter and if it is equal to the counter value a match occurs and the output changes
state.
The duty registers for each channel are double buffered, so if they change while the channel is enabled, the change will NOT
take effect until one of the following occurs:
In this way, the output of the PWM will always be either the old duty waveform or the new duty waveform, not some variation in
between. If the channel is not enabled, then writes to the duty register will go directly to the latches as well as the buffer.
See
To calculate the output duty cycle (high time as a% of period) for a particular channel:
For boundary case programming values, please refer to
Freescale Semiconductor
Offset
93.
Reset
W
R
•
•
•
•
•
Section 4.13.4.2.3, “PWM Period and Duty"”
(93)
Offset related to 0x0200 for blocking access and 0x300 for non blocking access within the global address space.
The effective period ends
The counter is written (counter resets to $00)
The channel is disabled
Polarity = 0 (PPOL x =0)
Polarity = 1 (PPOLx = 1)
0x68/0x69
– Duty Cycle = [(PWMPERx-PWMDTYx)/PWMPERx] * 100%
– Duty Cycle = [PWMDTYx / PWMPERx] * 100%
Bit 7
PWM Channel Duty Registers (PWMDTYx)
7
0
Reads of this register return the most recent value written. Reads do not necessarily return
the value of the currently active duty due to the double buffering scheme.
Depending on the polarity bit, the duty registers will contain the count of either the high time
or the low time. If the polarity bit is one, the output starts high and then goes low when the
duty count is reached, so the duty registers contain a count of the high time. If the polarity
bit is zero, the output starts low and then goes high when the duty count is reached, so the
duty registers contain a count of the low time.
6
0
6
Figure 24. PWM Channel Duty Registers (PWMDTYx)
0
5
5
for more information.
Section 4.13.4.2.7, “PWM Boundary
NOTE
NOTE
0
4
4
0
3
3
0
2
2
PWM Control Module (PWM8B2C)
Cases"”.
1
0
1
Access: User read/write
MM912F634
Bit 0
0
0
98
Related parts for MM912F634DV1AER2
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![mm912f634](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Mm912f634 - Integrated S12 Based Relay Driver With Lin
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MM912F634BC1AE](/photos/39/70/397085/mm908_tmb.jpg)
Part Number:
Description:
DUAL LS/HS SWITCH W. LIN
Manufacturer:
Freescale Semiconductor
![MM912F634BC1AER2](/photos/39/70/397085/mm908_tmb.jpg)
Part Number:
Description:
DUAL LS/HS SWITCH W. LIN
Manufacturer:
Freescale Semiconductor
![MM912F634BC2AE](/photos/39/70/397085/mm908_tmb.jpg)
Part Number:
Description:
DUAL LS/HS SWITCH W. LIN
Manufacturer:
Freescale Semiconductor
![MM912F634BC2AER2](/photos/39/70/397085/mm908_tmb.jpg)
Part Number:
Description:
DUAL LS/HS SWITCH W. LIN
Manufacturer:
Freescale Semiconductor
![MM912F634BC3AE](/photos/39/70/397085/mm908_tmb.jpg)
Part Number:
Description:
DUAL LS/HS SWITCH W. LIN
Manufacturer:
Freescale Semiconductor
![MM912F634BC3AER2](/photos/39/70/397085/mm908_tmb.jpg)
Part Number:
Description:
DUAL LS/HS SWITCH W. LIN
Manufacturer:
Freescale Semiconductor
![MM912F634BV2AE](/photos/39/70/397085/mm908_tmb.jpg)
Part Number:
Description:
DUAL LS/HS SWITCH W. LIN
Manufacturer:
Freescale Semiconductor
![MM912F634BV2AER2](/photos/39/70/397085/mm908_tmb.jpg)
Part Number:
Description:
DUAL LS/HS SWITCH W. LIN
Manufacturer:
Freescale Semiconductor
![MM912F634BV3AE](/photos/39/70/397085/mm908_tmb.jpg)
Part Number:
Description:
DUAL LS/HS SWITCH W. LIN
Manufacturer:
Freescale Semiconductor
![MM912F634BV3AER2](/photos/39/70/397085/mm908_tmb.jpg)
Part Number:
Description:
DUAL LS/HS SWITCH W. LIN
Manufacturer:
Freescale Semiconductor
![MC14560BCP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC12034AP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MPIC2112P](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
![MC14520BCP](/images/manufacturer_photos/0/2/263/freescale_semiconductor__inc_tmb.jpg)
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet: