Pin function descriptions

[bforster]

I have been scouring the Referance Guide V 2.2 and the Hardware Technical Manual V1.2 for a description of what the TPM1CH2 on pin 2 and the BKDG on pin 22 are and what they are for. I have searched the forum too and have found nothing. I assume the BKDG is for the Freescale micro but I thought these modules were programmed through the serial port? Please let me know where I can find these answers.

Thank you.

[Jheath]

I have been scouring the Referance Guide V 2.2 and the Hardware Technical Manual V1.2 for a description of what the TPM1CH2 on pin 2

This is the PWM timer pin. TPM is a Freescale term. Under the hood of the Synapse module is a 9S08 microprocessor. It has several timers and channels - this is the 2nd channel of the 1st Timer.

From the Freescale Datasheet:
"The MC9S08GBxxA/GTxxA includes two independent timer/PWM (TPM) modules which support
traditional input capture, output compare, or buffered edge-aligned pulse-width modulation (PWM) on
each channel."

and the BKDG on pin 22 are and what they are for

Again a Freescale term. This is the Background-Debug pin. SNAP firmware is updated over the serial port, but this is how code is initially programmed into flash memory at the factory and is used in our development work.

[bforster]

Am I to assume that the BKDG pin is how we will add our application on the 20K of flash then or is that done serially?

[Jheath]

Am I to assume that the BKDG pin is how we will add our application on the 20K of flash then or is that done serially?

No need for wires. The application can be simply uploaded over the air using Portal.

The serial port is only required in the event you wish to upgrade the underlying firmware. Something you shouldn't have to do very often (if at all).

[bforster]

Awesome. Thank you. It would be very beneficial I think to have this info in the hardware datasheet. Thank you for your prompt help.

[kbanks]

Search this forum for "datasheet". You will find a link to the 9S08 datasheet from Freescale.