mc9s08ac32 Freescale Semiconductor, Inc, mc9s08ac32 Datasheet - Page 279

• Manufacturer Part Number: mc9s08ac32
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
6. Write to TPMxMODH:L registers in BDM mode
— TPMxCnVH:L = (TPMxMODH:L - 1) [SE110-TPM case 2]
— TPMxCnVH:L is changed from 0x0000 to a non-zero value [SE110-TPM case 3 and 5]
— TPMxCnVH:L is changed from a non-zero value to 0x0000 [SE110-TPM case 4]
Registers
In the TPM v3 a write to TPMxSC register in BDM mode clears the write coherency mechanism
of TPMxMODH:L registers. Instead, in the TPM v2 this coherency mechanism is not cleared when
there is a write to TPMxSC register.
In this case, the TPM v3 produces almost 100% duty cycle. Instead, the TPM v2 produces 0%
duty cycle.
In this case, the TPM v3 waits for the start of a new PWM period to begin using the new duty
cycle setting. Instead, the TPM v2 changes the channel output at the middle of the current
PWM period (when the count reaches 0x0000).
In this case, the TPM v3 finishes the current PWM period using the old duty cycle setting.
Instead, the TPM v2 finishes the current PWM period using the new duty cycle setting.
(TPMxMODH:TPMxMODL))
MC9S08AC60 Series Data Sheet, Rev. 2
(Section 15.5.3, “TPM Counter Modulo
Chapter 15 Timer/PWM Module (S08TPMV3)
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