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Commit	Line	Data
	1	FC980C Alt controller
	2	=====================
	3	2017/07/21
	4
	5	This controler replaces original controller of Leopold FC980C and makes the keyboard programmable.
	6
	7	Discuss this here: https://geekhack.org/index.php?topic=90681.0
	8
	9	The keyboard is very similar electronically to its sibling model FC660C you can also refer this.
	10
	11	FC660C Alt Controller: https://geekhack.org/index.php?topic=88439.0
	12
	13
	14	Hardware
	15	--------
	16	This project uses common and familiar ATmega32u4 but any microcontroller with 5V I/O will work.
	17
	18	- Schematic of Alt controller: schematic.pdf
	19
	20
	21	Pin configuration
	22	-----------------
	23	Connector bridging between switch board and controller is Hirose DF14A-20P-1.25H.
	24
	25	\|Switch \|Controller \|
	26	\| board \| board \|Description \|Function \|ATmega32u4
	27	\|--------\|-----------\|--------------------------------------\|-----------\|------------
	28	\| 1 \|20 \| FG \|FG \|GND
	29	\| 2 \|19 \| GND \|GND \|GND
	30	\| 3 \|18 \| GND \|GND \|GND
	31	\| 4 \|17 \| 3.3V \|V33 \|3.3V/5V
	32	\| 5 \|16 \| 5V \|Vcc \|5V
	33	\| 6 \|15 \|*Z6-TP1684-4-HYS(o) \|KEY_HYS \|PC7
	34	\| 7 \|14 \|*Z6-TP1684-2-KEY(i) \|KEY_STATE \|PC6
	35	\| 8 \|13 \|*Z7-AD5258-5-SCL(I2C) \|I2C_SCL \|PD0(TWI)
	36	\| 9 \|12 \|*Z7-AD5258-4-SDA(I2C) \|I2C_SDA \|PD1(TWI)
	37	\|10 \|11 \|*Z5/4-LV4051A-6-~EN(Lo:Z5 Hi:Z4) \|COL_bit3 \|PB3
	38	\|11 \|10 \|+Z3-LV07A-5 (LV4051A-9-C) \|COL_bit2 \|PB2
	39	\|12 \| 9 \|+Z3-LV07A-1 (LV4051A-10-B) \|COL_bit1 \|PB1
	40	\|13 \| 8 \|+Z3-LV07A-3 (LV4051A-11-A) \|COL_bit0 \|PB0
	41	\|14 \| 7 \|+Z1-LVC138A-3-C \|ROW_bit2 \|PD6
	42	\|15 \| 6 \|+Z1-LVC138A-2-B \|ROW_bit1 \|PD5
	43	\|16 \| 5 \|+Z1-LVC138A-1-A \|ROW_bit0 \|PD4
	44	\|17 \| 4 \|+Z1-LVC138A-4-~G2A Z6-TP1684-5-~EN \|KEY_ENABLE \|PD7
	45	\|18 \| 3 \|+Q4-NPN-B-NumLock_LED(Hi:On) \|LED_NUML \|PB4
	46	\|19 \| 2 \|+Q3-NPN-B-CapsLock_LED(Hi:On) \|LED_CAPS \|PB5
	47	\|20 \| 1 \|+Q2-NPN-B-ScrollLock_LED(Hi:On) \|LED_SCRL \|PB6
	48
	49	```
	50	* 5V intferface
	51	+ 3.3V interface
	52	```
	53
	54
	55	Switch matrix
	56	-------------
	57
	58	\| \|0 \|1 \|2 \|3 \|4 \|5 \|6 \|7 \|8 \|9 \|A \|B \|C \|D \|E \|F \|
	59	\|----\|----\|----\|----\|----\|----\|----\|----\|----\|----\|----\|----\|----\|----\|----\|----\|----\|
	60	\| 0\|Left\|RCtl\|RAlt\| \|Down\|P. \|Righ\|P0 \|X \|LGui\|` \|V \| \|Esc \|M \|Spc \|
	61	\| 1\|Fn \|. \| \| \|P1 \|PEnt\|P2 \|P3 \|Z \|LAlt\|RCtl\|C \|K \| \|N \|B \|
	62	\| 2\|' \|/ \|, \| \|P4 \|P+ \|P5 \|P6 \|D \|A \|LSft\|F \|J \|F1 \|H \|G \|
	63	\| 3\|RSft\|; \|L \|] \|Up \| \| \| \|S \|Q \|Caps\|R \|I \|F3 \|U \|T \|
	64	\| 4\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|
	65	\| 5\|= \|- \|0 \|\ \|NLck\|BSpc\|P/ \|P* \|3 \|2 \| \|4 \|9 \|F2 \|7 \|6 \|
	66	\| 6\|[ \|P \|O \|Ent \|P7 \|P- \|P8 \|P9 \|W \|1 \|Tab \|E \|8 \|F4 \|Y \|5 \|
	67	\| 7\|F11 \|F10 \|F9 \|F12 \|Del \|PgDn\|Ins \|PgUp\| \| \| \| \|F8 \|F5 \|F7 \|F6 \|
	68
	69
	70	Row designation
	71	---------------
	72	LV138A(Z1) selects one of 8 row lines and gives strobe by enabling with ~G2A(17).
	73
	74	\|ROW \|bit0\|bit1\|bit2\|
	75	\|----\|----\|----\|----\|
	76	\|0 \|0 \|0 \|0 \|
	77	\|1 \|1 \|0 \|0 \|
	78	\|2 \|0 \|1 \|0 \|
	79	\|3 \|1 \|1 \|0 \|
	80	\|4 \|0 \|0 \|1 \|
	81	\|5 \|1 \|0 \|1 \|
	82	\|6 \|0 \|1 \|1 \|
	83	\|7 \|1 \|1 \|1 \|
	84
	85
	86	Column designation
	87	------------------
	88	LV4051A(Z4, Z5) select one of 16 column lines to sense capacitance of switches.
	89
	90	\|COL \|bit0\|bit1\|bit2\|bit3\|
	91	\|----\|----\|----\|----\|----\|
	92	\|0 \|0 \|0 \|0 \|0 \|
	93	\|1 \|1 \|0 \|0 \|0 \|
	94	\|2 \|0 \|1 \|0 \|0 \|
	95	\|3 \|1 \|1 \|0 \|0 \|
	96	\|4 \|0 \|0 \|1 \|0 \|
	97	\|5 \|1 \|0 \|1 \|0 \|
	98	\|6 \|0 \|1 \|1 \|0 \|
	99	\|7 \|1 \|1 \|1 \|0 \|
	100	\|8 \|0 \|0 \|0 \|1 \|
	101	\|9 \|1 \|0 \|0 \|1 \|
	102	\|A \|0 \|1 \|0 \|1 \|
	103	\|B \|1 \|1 \|0 \|1 \|
	104	\|C \|0 \|0 \|1 \|1 \|
	105	\|D \|1 \|0 \|1 \|1 \|
	106	\|E \|0 \|1 \|1 \|1 \|
	107	\|F \|1 \|1 \|1 \|1 \|
	108
	109
	110	Firmware
	111	--------
	112	Just `make` to build firmware. And consult with wiki for further information.
	113
	114	- https://github.com/tmk/tmk_keyboard/tree/master/keyboard/fc660c
	115	- https://github.com/tmk/tmk_keyboard/wiki
	116
	117
	118	Datasheets
	119	----------
	120	- Hirose DF14A-20P-1.25H: http://www.mouser.com/ds/2/185/DF14_catalog-939195.pdf
	121	- LV07A: http://www.ti.com/lit/ds/symlink/sn74lv07a.pdf
	122	- LV138A: http://www.ti.com/lit/ds/symlink/sn74lvc138a.pdf
	123	- LV4051A: http://www.ti.com/lit/ds/symlink/sn74lv4051a.pdf
	124	- AD5258: http://www.analog.com/media/en/technical-documentation/data-sheets/AD5258.pdf
	125	- JST S5B-PH-SM4: http://www.jst-mfg.com/product/pdf/eng/ePH.pdf
	126	- Hirose UX60SC-MB-5S8: https://www.hirose.com/product/en/products/UX/UX60SC-MB-5S8%2880%29/
	127	- TYU TU1252WNR-05S: http://php2.twinner.com.tw/files/tyu/TU1252series.pdf
	128	- Tr(E42) for LED?: http://cj-elec.com/txUpfile/2013614923661845.pdf
	129
	130
	131	3.3V power supply
	132	-----------------
	133	LV07A and LVC138A are 5V-tolerant and can be powered with 5V, the keyboard will work only with 5V power supply. It may not be completely safe to operate LV138A with 5V Vcc, its datasheet says:
	134
	135	> Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
	136
	137
	138	Digipot AD5258
	139	--------------
	140	Controller can operate AD5258 via I2C to change actuation point of keys. This may make keyboard unusable accidentally and it will be difficult to recovery in some situation. For safety firmware doesn't support it at this point, though.
	141
	142	Lower value of RDAC register causes shallower actuation point.
	143
	144
	145	USB connector board
	146	-------------------
	147	The keyboard has USB receptacle on small separate 1.0mm-thick PCB. USB receptacle is Hirose UX60SC-MB-5S8 while wire-to-PCB connector is TYU TU1252WNR-05S.
	148
	149	http://i.imgur.com/Nucn6h9.jpg
	150
	151
	152	Resources
	153	---------
	154	- Pics: http://imgur.com/a/HhyIq