- #Distinguish front and back jm32 how to#
- #Distinguish front and back jm32 serial#
- #Distinguish front and back jm32 series#
The 908 comes up fine every time, but apparently the S08QG (and other low-pin-count devices that lack a dedicated RESET pin) are a bit hard to get reliably into BDM when they are blank. I plug a cable into a 4-pin header on the breadboard, and everything powers up at the same time. It turns out that blank S08QG chips have to be powered up into active background mode, by holding the BKGD/MS (MS means “mode select”) pin LOW during POR. Last night, while perusing the 8-bit forum for more posts about “trouble” with the DEMO boards’ built-in BDM interfaces, I stumbled across a link to my answer. I can measure BDM SYNC pulses with some measure of reliability and repeatability, but I can’t seem to get anything out of the background debug controller (BDC) on the S08. I’ve run into trouble in the second stage of my bootstrap as well: getting the 908QB8 to act as a background debug mode (BDM) host, talking to an S08QG8.
It’s obviously forward-biased, and when power is removed from the board, it will reasonably quickly discharge the modest capacitance – less than 100♟ – on the board.) I think what may have actually made my breadboard work reliably was adding a power LED. (Thinking about this in 2018 I wonder: Would the board capacitances discharge through that diode? It’s not the same as adding “snubber” diodes to an inductive load. I would never have figured this out without the forum.
#Distinguish front and back jm32 series#
The (cheap) voltmeter I used to measure this quickly discharged the on-board capacitors, and I got a good POR that way, and was able to get into the ROM monitor and talk to the chip.īy adding, between Vdd and Vss, a reverse-biased diode in series with a small resistance, I was able to get reliable resets. I measured Vdd with the power disconnected from my breadboard, and, sure enough, it was stuck at 2v or so. Vdd needs to go to within a few tens of millivolts of ground before it comes back up.
#Distinguish front and back jm32 serial#
(These parts have a bulit-in ROM monitor that bitbangs a serial protocol on a port pin.) After a day or so of going crazy, I found this thread on the 8-bit forum about the 908 parts requiring a really clean power-on reset (POR). When I started the long bootstrapping process (that I’m still deeply mired in) I initially had trouble getting my breadboarded 908QB8 to talk to the serial port. Use the index fingers of both hands to squeeze the metal strips on both sides of the nose bridge,Medical Mask so that the upper end of the medical mask can be close to the nose bridge,Medical Mask and the wearing is completed.2009 January 23 17:34 Freescale forums save me again
Use both hands to pull the folds of the medical mask up and down so that the mask can completely cover the nose, mouth and chin. Place the medical mask across the face, nose and nose, and use both hands to hang the ropes at both ends on the ears.
Don't wear it backwards.Īfter distinguishing the front and back sides of the medical mask and the upper and lower ends, wash your hands first and check whether the packaging of the medical mask is intact and whether there is any damage to the appearance of the stain. In addition, pay attention to the part with the metal strip above the mask. The face that is facing the face should be the reverse side of the medical mask, that is, the lighter side.
#Distinguish front and back jm32 how to#
Medical surgical masks (that is,Medical Mask common blue flat disposable masks) look at the front and back, how to divide the front and back of the medical mask? Very simple, the darker color of the mask is the front,Medical Mask the front should be facing out, and there are metal strips for nose clips on the medical mask.