HHKBBT.txt

HHKB Professional BT
====================
Internal shots:
http://imgur.com/a/YfcYt/all

Product info:
https://www.pfu.fujitsu.com/hhkeyboard/bt/


Controller
----------
m430f5510 TI MSP430
http://www.ti.com/lit/ds/symlink/msp430f5506.pdf


bu48**
Rohm reset IC
http://rohmfs.rohm.com/jp/products/databook/datasheet/ic/power/voltage_detector/bu48xxg-j.pdf
bu4819      1.9V
    Z11 for Battery voltage to MCU
bu4820 x3   2.0V
    Z10 for Battery voltage to MUC
    Z12 for VOUT of Bluetooth module to MUC
    Z16 for VOUT of Bluetooth module to BT module
bu4822      2.2V
    Z17 for Battery voltage to MUC


LTC4415 Z15 power switch
siwtch between battery and USB power
http://www.linear.com/product/LTC4415
http://cds.linear.com/docs/en/datasheet/4415fa.pdf


S1170B33 Z14 voltage regulator
http://datasheet.sii-ic.com/en/voltage_regulator/S1170_E.pdf

TPS2065 Z9 USB pwoer distribution switch
http://www.tij.co.jp/product/jp/TPS2065
http://www.tij.co.jp/jp/lit/ds/symlink/tps2065.pdf


CN2: To Power board (Hirose DF13-10)
10  GND
8   USB power
9   Battery
7   DIPSW1
6   DIPSW2
5   DIPSW3
4   DIPSW4
3   DIPSW5
2   DIPSW6
1   Reset

CN1: MSP430 ISP JTAG/Spy-by-wire (JST SH-10)
1   TDO Z13-60  pull-up'd with 51K
2   NC
3   TDI Z13-61  pull-up'd with 51K
4   VCC 3V
5   TMS Z13-62  pull-up'd with 51K
6   RST Z13-64 100ohm in series
7   TCK Z13-63  pull-up'd with 51K
8   TEST/SBWTCK Z13-9
9   GND
10  NC

CN7: UART to BT module (JST SH-2)
1   RX  BT module UART
2   TX  BT module UART

CNL1: PCB vs PCB connector (Hirose DF12 stacking height 3mm)
See Switch Board.


Hirose DF12: https://www.hirose.co.jp/cataloge_hp/en_DF12_20130411.pdf
Hirose DF13: http://www.hirose.co.jp/cataloge_hp/en_DF13_20130411.pdf
JST SH: http://www.jst-mfg.com/product/pdf/eng/eSH.pdf



Bluetooth module
----------------
bcm20730

ath432
atmel I2C EEPROM
http://www.atmel.com/images/atmel-8568-seeprom-at24c256c-datasheet.pdf

GM30G DC-DC stepup(3.0V)
has inductor and diode

13 VOUT 3.0V
21 VIN from LTC4415 power switch


Switch board
------------
LV07A open-drain driver
http://www.ti.com/lit/ds/symlink/sn74lv07a.pdf

LW051A analog multiplexer
http://www.ti.com/lit/ds/symlink/sn74lv4051a.pdf


some chips are engraved

Z2,Z3   LW051A  analog switch
Z4      Topre capsense
    5   CNH1-8
Z5      AD5258 digital potentiometer

Z7,Z8   LV74A? flipflop

CNH1
1   VCC from TPS2065 3.0V
2   VCC from TPS2065 3.0V
3   LED1 blue cathode
4   LED2 orange cathode
5   Z8-5
6   R26(51K) - Z6-5
7   Z7-3
8   Z4-5
9   GND
10  GND
11  Z2,Z3-11    A   LW051A analog switch
12  Z2,Z3-10    B   LW051A analog switch
13  Z2,Z3-9     C   LW051A analog switch
14  Z2-6        ~EN LW051A analog switch
15  Z3-6        ~EN LW051A analog switch
16  Z1-1        buffer input LV07A
17  Z1-3        buffer input LV07A
18  Z1-5        buffer input LV07A
19  Z1-9        buffer input LV07A
20  Z1-11       buffer input LV07A



Power board
-----------
CN4: To Controller
1   GND
3   USB power
2   Battery
4   DIPSW1
5   DIPSW2
6   DIPSW3
7   DIPSW4
8   DIPSW5
9   DIPSW6
10  Reset