XC912BC32CFU8 Motorola Semiconductor Products, XC912BC32CFU8 Datasheet - Page 143

• Manufacturer Part Number: XC912BC32CFU8
• Description: M68HC12B Family Data Sheet
• Manufacturer: Motorola Semiconductor Products

11.2.11 PWM Channel Duty Registers 0–3
M68HC12B Family — Rev. 8.0
MOTOROLA
the existing period terminates, forcing the counter to reset. The new period is then
latched and is used until a new period value is written. Reading this register returns
the most recent value written. To start a new period immediately, write the new
period value and then write the counter, forcing a new period to start with the new
period value.
Read: Anytime
Write: Anytime
The value in each duty register determines the duty of the associated PWM
channel. When the duty value is equal to the counter value, the output changes
Period = Channel-Clock-Period × (PWPER + 1)
Period = Channel-Clock-Period × PWPER × 2
Address: $0050
Address: $0051
Address: $0052
Address: $0053
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Figure 11-20. PWM Channel Duty Register 0 (PWDTY0)
Figure 11-21. PWM Channel Duty Register 1 (PWDTY1)
Figure 11-22. PWM Channel Duty Register 2 (PWDTY2)
Figure 11-23. PWM Channel Duty Register 3 (PWDTY3)
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
1
1
1
1
Pulse-Width Modulator (PWM)
Bit 6
Bit 6
Bit 6
Bit 6
6
1
6
1
6
1
6
1
Bit 5
Bit 5
Bit 5
Bit 5
5
1
5
1
5
1
5
1
Bit 4
Bit 4
Bit 4
Bit 4
4
1
4
1
4
1
4
1
Bit 3
Bit 3
Bit 3
Bit 3
3
1
3
1
3
1
3
1
Pulse-Width Modulator (PWM)
PWM Register Descriptions
Bit 2
Bit 2
Bit 2
Bit 2
2
1
2
1
2
1
2
1
(CENTR = 0)
(CENTR = 1)
Bit 1
Bit 1
Bit 1
Bit 1
1
1
1
1
1
1
1
1
Data Sheet
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0
1
1
1
1
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