MC68HC912B32VFU8 Freescale Semiconductor, MC68HC912B32VFU8 Datasheet - Page 131
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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11.2.4 PWM Prescale Counter
Read: Anytime
Write: Only in special mode (SMOD = 1)
PWPRES is a free-running 7-bit counter.
11.2.5 PWM Scale Register 0
Read: Anytime
Write: Anytime
A write causes the scaler counter PWSCNT0 to load the PWSCAL0 value unless it is in special mode with
DISCAL = 1 in the PWTST register.
PWM channels 0 and 1 can select clock S0 (scaled) as its input clock by setting the control bit PCLK0
and PCLK1 respectively. Clock S0 is generated by dividing clock A by the value in the PWSCAL0 register
plus one and dividing again by two. When PWSCAL0 = $FF, clock A is divided by 256 then divided by two
to generate clock S0.
11.2.6 PWM Scale Counter 0 Value
Read: Anytime
PWSCNT0 is a down-counter that, upon reaching $00, loads the value of PWSCAL0.
Freescale Semiconductor
Address: $0043
Address: $0044
Address: $0045
Reset:
Reset:
Reset:
Read:
Read:
Read:
Write:
Write:
Write:
Figure 11-9. PWM Scale Counter Register 0 (PWSCNT0)
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
0
0
0
0
Figure 11-8. PWM Scale Register 0 (PWSCAL0)
Figure 11-7. PWM Prescale Counter (PWPRES)
= Unimplemented
= Unimplemented
Bit 6
Bit 6
Bit 6
6
0
6
0
6
0
M68HC12B Family Data Sheet, Rev. 9.1
Bit 5
Bit 5
Bit 5
5
0
5
0
5
0
Bit 4
Bit 4
Bit 4
4
0
4
0
4
0
Bit 3
Bit 3
Bit 3
3
0
3
0
3
0
Bit 2
Bit 2
Bit 2
2
0
2
0
2
0
Bit 1
Bit 1
Bit 1
1
0
1
0
1
0
PWM Register Descriptions
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
0
0
0
131
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