MC68HC912B32VFU8 Freescale Semiconductor, MC68HC912B32VFU8 Datasheet - Page 129
MC68HC912B32VFU8
Manufacturer Part Number
MC68HC912B32VFU8
Description
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68HC912B32VFU8.pdf
(334 pages)
Specifications of MC68HC912B32VFU8
Cpu Family
HC12
Device Core Size
16b
Frequency (max)
8MHz
Interface Type
SCI/SPI
Program Memory Type
EPROM
Program Memory Size
32KB
Total Internal Ram Size
1KB
# I/os (max)
63
Operating Supply Voltage (typ)
5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.5V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 105C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
80
Package Type
PQFP
Lead Free Status / Rohs Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68HC912B32VFU8
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
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11.2.2 PWM Clock Select and Polarity Register
Read: Anytime
Write: Anytime
PCLK3 — PWM Channel 3 Clock Select Bit
PCLK2 — PWM Channel 2 Clock Select Bit
PCLK1 — PWM Channel 1 Clock Select Bit
PCLK0 — PWM Channel 0 Clock Select Bit
PPOL3 — PWM Channel 3 Polarity Bit
PPOL2 — PWM Channel 2 Polarity Bit
PPOL1 — PWM Channel 1 Polarity Bit
PPOL0 — PWM Channel 0 Polarity Bit
Depending on the polarity bit, the duty registers may contain the count of either the high time or the low
time. If the polarity bit is 0 and left alignment is selected, the duty registers contain a count of the low time.
If the polarity bit is 1, the duty registers contain a count of the high time.
Freescale Semiconductor
If a clock select is changed while a PWM signal is being generated, a truncated or stretched pulse may
occur during the transition.
0 = Clock B is the clock source for channel 3.
1 = Clock S1 is the clock source for channel 3.
0 = Clock B is the clock source for channel 2.
1 = Clock S1 is the clock source for channel 2.
0 = Clock A is the clock source for channel 1.
1 = Clock S0 is the clock source for channel 1.
0 = Clock A is the clock source for channel 0.
1 = Clock S0 is the clock source for channel 0.
0 = Channel 3 output is low at the beginning of the period, high when the duty count is reached.
1 = Channel 3 output is high at the beginning of the period, low when the duty count is reached.
0 = Channel 2 output is low at the beginning of the period, high when the duty count is reached.
1 = Channel 2 output is high at the beginning of the period, low when the duty count is reached.
0 = Channel 1 output is low at the beginning of the period, high when the duty count is reached.
1 = Channel 1 output is high at the beginning of the period, low when the duty count is reached.
0 = Channel 0 output is low at the beginning of the period, high when the duty count is reached.
1 = Channel 0 output is high at the beginning of the period, low when the duty count is reached.
Address: $0041
Reset:
Read:
Write:
Figure 11-5. PWM Clock Select and Polarity Register (PWPOL)
PCLK3
Bit 7
0
PCLK2
6
0
M68HC12B Family Data Sheet, Rev. 9.1
PCLK1
5
0
PCLK0
4
0
PPOL3
3
0
PPOL2
2
0
PPOL1
1
0
PWM Register Descriptions
PPOL0
Bit 0
0
129
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