S9S08AW16A FREESCALE [Freescale Semiconductor, Inc], S9S08AW16A Datasheet - Page 188

• Manufacturer Part Number: S9S08AW16A
• Description: HCS08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Timer/PWM Module (S08TPMV3)
188
TPMxCNTH:TPMxCNTL
TPMxMODH:TPMxMODL = 0x0007
TPMxCnVH:TPMxCnVL = 0x0005
EPWM mode
(in TPMv2 and TPMv3)
TPMv2 TPMxCHn
CLKSB:CLKSA BITS
TPMv3 TPMxCHn
ELSnB:ELSnA BITS
RESET (active low)
MSnB:MSnA BITS
The following procedure can be used in TPM v3 (when the channel pin is also a port pin) to emulate
the high-true EPWM generated by TPM v2 after the reset.
...
configure the channel pin as output port pin and set the output pin;
configure the channel to generate the EPWM signal but keep ELSnB:ELSnA as 00;
configure the other registers (TPMxMODH, TPMxMODL, TPMxCnVH, TPMxCnVL, ...);
configure CLKSB:CLKSA bits (TPM v3 starts to generate the high-true EPWM signal, however
TPM does not control the channel pin, so the EPWM signal is not available);
wait until the TOF is set (or use the TOF interrupt);
enable the channel output by configuring ELSnB:ELSnA bits (now EPWM signal is available);
...
BUS CLOCK
Figure 10-18. Generation of low-true EPWM signal by TPM v2 and v3 after the reset
CHnF BIT
00
00
MC9S08AC16 Series Data Sheet, Rev. 8
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