keyboard/hhkb_rn42/PowerSave.txt

   1 RN-42
   2 =====
   3
   4
   5 12/11
   6 Power Comsumption
   7 MCU+HHKB
   8 --------
   9 Battery drive:
  10     idle    18.9mA
  11     active  35.8mA
  12
  13 USB powered:
  14     40.0mA
  15
  16
  17 HHKB key switch power control
  18 -----------------------------
  19 MOS FET Nch: BSS138 or IRLML6344T, either works and no apparent difference.
  20 Normally on(pull-up) or off(pull-down)? interms of power saving it prefers pull-down?
  21
  22 Pull-down will be better for power saving, normally off.
  23
  24
  25
  26 Used Timer
  27 ----------
  28
  29 8MHz clock
  30 ----------
  31 1) 16MHz xtal with system prescaler div2: F_CPU=8MHz, F_USB=16MHz
  32 2) 8MHz xtal with div1: F_CPU=8MHz, F_USB=8MHz
  33 Hardware USART doesn't work at 115200bps with 8MHz(F_CPU).
  34
  35 workaround:
  36 a) use Sotwre serial for communcation with RN-42
  37 b) reduce baud of RN-42 to lower rate;(factory default is 115200bps)
  38 10/03
  39
  40
  41
  42 Slave mode
  43 ----------
  44 Discovery/Inquire
  45 Connect/Page
  46
  47 SI,0012
  48 SJ,0012
  49 InqWindw=0100
  50 PagWindw=0100
  51
  52
  53 Sniff mode
  54 ----------
  55 0.625ms * <hex>
  56 SW,0320     Very sluggish. Type is not lost but very slow to register.
  57 SW,0160     Still sluggish. may transposed? can type but ...
  58             Mouse point move intermittently
  59 SW,0020     feel a bit late like stumble(20ms)
  60 SW,0010     feel no latency(10ms)
  61
  62
  63 Deep sleep
  64 ----------
  65 SW,8010
  66
  67
  68 TX power
  69 --------
  70 SY,fff4
  71
  72
  73 IO pins
  74 -------
  75 S%,1000         status led and connection control don't work
  76                 GPIO5: status LED
  77                 GPIO6: Connection control
  78                 GPIO2: linked status
  79
  80
  81
  82
  83
  84 Ver 6.15 04/26/2013
  85 (c) Roving Networks
  86 ***Settings***
  87 BTA=00066667BBE9
  88 BTName=tmkBT-BBE9
  89 Baudrt(SW4)=115K
  90 Mode  =DTR
  91 Authen=1
  92 Bonded=0
  93 Rem=001BDC06415B
  94 ***ADVANCED Settings***
  95 SrvName= keyboard/mouse
  96 SrvClass=0000
  97 DevClass=1F00
  98 InqWindw=0012
  99 PagWindw=0012
 100 CfgTimer=255
 101 StatuStr=NULL
 102 HidFlags=3c
 103 DTRtimer=8
 104 KeySwapr=0
 105 ***OTHER Settings***
 106 Profile= HID
 107 CfgChar= $
 108 SniffEna=8010
 109 LowPower=0          S|,
 110 TX Power=fff4       SY,
 111 IOPorts= 0
 112 IOValues=0
 113 Sleeptmr=0
 114 DebugMod=0
 115 RoleSwch=0