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qmk_firmware/keyboard/hhkb_rn42/PowerSave.txt

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Update doc
10 years ago
RN-42
=====
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
Ver 6.15 04/26/2013
(c) Roving Networks
***Settings***
BTA=00066667BBE9
BTName=tmkBT-BBE9
Baudrt(SW4)=115K
Mode =DTR
Authen=1
Bonded=0
Rem=001BDC06415B
***ADVANCED Settings***
SrvName= keyboard/mouse
SrvClass=0000
DevClass=1F00
InqWindw=0012
PagWindw=0012
CfgTimer=255
StatuStr=NULL
HidFlags=3c
DTRtimer=8
KeySwapr=0
***OTHER Settings***
Profile= HID
CfgChar= $
SniffEna=8010
LowPower=0 S|,
TX Power=fff4 SY,
IOPorts= 0
IOValues=0
Sleeptmr=0
DebugMod=0
RoleSwch=0