| 11:58 | topi` | jnettlet: what kind of sleep/hibernate options are there for HB Edge with the 3.14.mx kernel? |
| 11:59 | topi` | I guess DRAM needs refreshing, so at least 1W consumption... |
| 12:07 | bencoh | ram needs 1W? |
| 12:10 | vpeter | topi`: some infos - http://download.solid-run.com/pub/solidrun/SR-uSOM-mx6/AN2/SR-uSOM-AN2-Suspend-to-memory-power-consumption.pdf |
| 12:13 | topi` | vpeter: thanks |
| 12:13 | topi` | bencoh: in the old world, 1W was a probably good estimate for DDR ram |
| 12:13 | topi` | maybe these days it is so low voltage that it's no longer correct |
| 12:17 | vpeter | [Thursday, August 27, 2015] [04:59:31 PM] but until we get that working, we can. blank the screen, put the sata in low power, and then suspend the disk and get our idle power usage below 1Watt |
| 12:20 | bencoh | topi`: sounds huge to me for an embedded platform |
| 12:20 | topi` | vpeter: that document talks about the power consumption of the SoM, but the carrier board can take plenty of power |
| 13:02 | jnettlet | topi`, depends what you have hooked up. |
| 13:02 | topi` | jnettlet: good point. Nothing on the HDMI, a LoRa modem on the mikroBUS (probably eats 10-100 mW) |
| 13:02 | jnettlet | the minimum you are going to get with suspend to memory is about 36mA's |
| 13:03 | topi` | yes, that figure was for the SoM |
| 13:03 | jnettlet | with a bare board with minimal peripherals it is the same |
| 13:03 | topi` | I'm trying to calculate an estimate of how big a Lead-acid battery is needed |
| 13:03 | jnettlet | the big power eater during suspend is if you have a sata disk |
| 13:04 | jnettlet | but in general I see between 70-90mAs with usb wakeup enabled |
| 13:04 | jnettlet | just uart wakeup is on the lower end. |
| 13:06 | jnettlet | I spent quite a bit of time trimming the board's suspend power usage where I could. |