Current Consumption figures P2 v9B

Tubular

Here are some figures on current consumed running Chip's v9B images in three forms (BeMicro A2, DE0-Nano Bare, DE0-Nano with Parallax breakout)

These are just loading the included demos with 11, nothing more. Nil means nothing running - just whatever is happening after hitting control-g to reset the board. The breakout DE0 takes more current than the bare DE0 due to the dac resistors being hooked on

Demo             BeMicro A2   Bare DE0-Nano   Breakout DE0-Nano (w/dac resistors)
Nil              104mA        115mA           118mA
All Cogs Blink   111          155             156
NTSC_256x192     110          155             211
NTSC_Interrupt   118          191             243
ROM Booter       113          166             167
Sin Cos DACs     108          148             167
Smartpin PWM     111          155             155
Smartpin Serial  118          182             180
Smartpin USB     121          198             198 

jmg

Which supply point is that measured on ?
Seems the newest Cyclones are less mA/Activity, as you might expect.

Tubular

These boards are/can be powered via USB, so thats how I measured them. Initially tried two brands of inline USB measuring meters but they're horribly inaccurate especially at lower currents, so switched to a lab psu (powering the USB A cable)

Yes the Cyclone V based seem to be significantly more efficient, I was surprised by how much. I also noted previously that, with the P123 A9, running more cogs didn't take much more current.

ozpropdev

Interesting that toggling a pin in the NTSC interrupt code causes such a current increase.

.loop		xor	outa,#1			'keep toggling p0
		jmp	#.loop