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Diffstat (limited to 'keyboard/hhkb/rn42/PowerSave.txt')
| -rw-r--r-- | keyboard/hhkb/rn42/PowerSave.txt | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/keyboard/hhkb/rn42/PowerSave.txt b/keyboard/hhkb/rn42/PowerSave.txt new file mode 100644 index 0000000000..8aea1c6dd2 --- /dev/null +++ b/keyboard/hhkb/rn42/PowerSave.txt @@ -0,0 +1,76 @@ +Power Saving +============ + + +MCU+HHKB Power Comsumption +-------------------------- +Battery drive: + idle 18.9mA + active 35.8mA + +USB powered: + 40.0mA + + +HHKB key switch power control +----------------------------- +MOS FET Nch: BSS138 or IRLML6344T, either works and no apparent difference. +Normally on(pull-up) or off(pull-down)? interms of power saving it prefers pull-down? + +Pull-down will be better for power saving, normally off. + + + +Used Timer +---------- + +8MHz clock +---------- +1) 16MHz xtal with system prescaler div2: F_CPU=8MHz, F_USB=16MHz +2) 8MHz xtal with div1: F_CPU=8MHz, F_USB=8MHz +Hardware USART doesn't work at 115200bps with 8MHz(F_CPU). + +workaround: +a) use Sotwre serial for communcation with RN-42 +b) reduce baud of RN-42 to lower rate;(factory default is 115200bps) +10/03 + + + +Slave mode +---------- +Discovery/Inquire +Connect/Page + +SI,0012 +SJ,0012 +InqWindw=0100 +PagWindw=0100 + + +Sniff mode +---------- +0.625ms * <hex> +SW,0320 Very sluggish. Type is not lost but very slow to register. +SW,0160 Still sluggish. may transposed? can type but ... + Mouse point move intermittently +SW,0020 feel a bit late like stumble(20ms) +SW,0010 feel no latency(10ms) + + +Deep sleep +---------- +SW,8010 + + +TX power +-------- +SY,fff4 + + +IO pins +------- +S%,1000 status led and connection control don't work + GPIO5: status LED + GPIO6: Connection control + GPIO2: linked status |