fc660c: Update README
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FC660C controller
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=================
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2017/02/24
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2017/03/25
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Connector
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---------
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### Hirose DF14A-20P-1.25H
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[datasheet](http://www.mouser.com/ds/2/185/DF14_catalog-939195.pdf)
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Thread on Geekhack: https://geekhack.org/index.php?topic=88439.0
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### Pinouts
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LV07A and LVC138A are 5V-tolerant, the keyboard will work only with 5V power.
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|Controller |Switch |Description |ATmega32u4
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|-----------|--------|------------------------------------------|--------------
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| 1 | 20 | +Z7-LV07A-13-~CapsLED |PB6
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| 2 | 19 | +Z7-LV07A-11-~InsertLED |PB7
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| 3 | 18 | +Z3-LVC138A-4-~G2A Z6-TP1684-5-~EN |PD7
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| 4 | 17 | +Z3-LVC138A-3-A |PD4
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| 5 | 16 | +Z3-LVC138A-3-B |PD5
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| 6 | 15 | +Z3-LVC138A-3-C |PD6
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| 7 | 14 | +Z7-LV07A-3 LV4051A-11-A |PB0
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| 8 | 13 | +Z7-LV07A-1 LV4051A-10-B |PB1
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| 9 | 12 | +Z7-LV07A-5 LV4051A-9-C |PB2
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|10 | 11 | *Z5-LV4051A-6-~EN(Col 8-F) |PB3
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|11 | 10 | *Z4-LV4051A-6-~EN(Col 0-7) |PB4
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|12 | 9 | *Z2-AD5258-4-SDA(I2C) |PD1(TWI)
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|13 | 8 | *Z2-AD5258-5-SDL(I2C) |PD0(TWI)
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|14 | 7 | *Z6-TP1684-2-KEY(i) |PC6
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|15 | 6 | *Z6-TP1684-4-HYS(o) |PC7
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|16 | 5 | 5V |5V
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|17 | 4 | 3.3V |5V
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|18 | 3 | GND |GND
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|19 | 2 | GND |GND
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|20 | 1 | FG |GND
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Firmware
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--------
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Just `make` to build firmware. And consult with wiki for further information.
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https://github.com/tmk/tmk_keyboard/wiki
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Pinouts
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-------
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|Switch |Controller |
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| board | board |Description |Schematic |ATmega32u4
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|--------|-----------|--------------------------------------|-----------|------------
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| 1 |20 | FG |FG |GND
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| 2 |19 | GND |GND |GND
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| 3 |18 | GND |GND |GND
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| 4 |17 | 3.3V |V33 |3.3V/5V
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| 5 |16 | 5V |Vcc |5V
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| 6 |15 |*Z6-TP1684-4-HYS(o) |FBSTB |PC7
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| 7 |14 |*Z6-TP1684-2-KEY(i) |OUT |PC6
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| 8 |13 |*Z2-AD5258-5-SCL(I2C) |SCL |PD0(TWI)
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| 9 |12 |*Z2-AD5258-4-SDA(I2C) |SDA |PD1(TWI)
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|10 |11 |*Z4-LV4051A-6-~EN(Col 0-7) |INH_1 |PB4
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|11 |10 |*Z5-LV4051A-6-~EN(Col 8-F) |INH_2 |PB3
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|12 | 9 |+Z7-LV07A-5 (LV4051A-9-C) |SEL_C |PB2
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|13 | 8 |+Z7-LV07A-1 (LV4051A-10-B) |SEL_B |PB1
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|14 | 7 |+Z7-LV07A-3 (LV4051A-11-A) |SEL_A |PB0
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|15 | 6 |+Z3-LVC138A-3-C |COL4 |PD6
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|16 | 5 |+Z3-LVC138A-2-B |COL3 |PD5
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|17 | 4 |+Z3-LVC138A-1-A |COL2 |PD4
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|18 | 3 |+Z3-LVC138A-4-~G2A Z6-TP1684-5-~EN |COL1 |PD7
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|19 | 2 |+Z7-LV07A-11-~InsertLED |LED1 |PB7
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|20 | 1 |+Z7-LV07A-13-~CapsLED |LED2 |PB6
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```
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* 5V intferface
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+ 3.3V interface
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```
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- Connector on Switch board: https://i.imgur.com/Zi89xO5.jpg
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- Connector on Controller board: https://i.imgur.com/9SZUzYo.jpg
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Key Matrix
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----------
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Row5-7 has no key, you can omit scaning those. Topre original controller scans those rows for some reason.
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Row5-7 have no key, you can omit scaning on those lines. Topre original controller scans those rows for some reason.
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| |0 |1 |2 |3 |4 |5 |6 |7 |8 |9 |A |B |C |D |E |F |
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|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|----|
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@ -53,13 +64,77 @@ Row5-7 has no key, you can omit scaning those. Topre original controller scans t
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| 6| | | | | | | | | | | | | | | | |
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| 7| | | | | | | | | | | | | | | | |
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Logic analyzer pics:
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- https://i.imgur.com/9SZUzYo.jpg
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- https://i.imgur.com/5FCP1Ay.png
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Scan
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----
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Row: Drive(LVC138A)
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Col: Sense(4051)
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This code emuluates what original cotnroller does for matrix scan.
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- https://github.com/tmk/tmk_keyboard/blob/master/keyboard/fc660c/fc660c.c
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### Row designation
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LV138A(Z3) selects a row line and gives strobe by enabling with ~G2A(18).
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|Row |A/17|B/16|C/15|
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|----|----|----|----|
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|0 |0 |0 |0 |
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|1 |1 |0 |0 |
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|2 |0 |1 |0 |
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|3 |1 |1 |0 |
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|4 |0 |0 |1 |
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|5 |1 |0 |1 |
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|6 |0 |1 |1 |
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|7 |1 |1 |1 |
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### Column designation
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LV4051A(Z4, Z5) select one of 16 column lines to sense capacitance of switches.
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|Col |A/14|B/13|C/12|Z4-EN/10|Z5-EN/11|
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|----|----|----|----|--------|--------|
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|0 |0 |0 |0 |0 |1 |
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|1 |1 |0 |0 |0 |1 |
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|2 |0 |1 |0 |0 |1 |
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|3 |1 |1 |0 |0 |1 |
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|4 |0 |0 |1 |0 |1 |
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|5 |1 |0 |1 |0 |1 |
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|6 |0 |1 |1 |0 |1 |
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|7 |1 |1 |1 |0 |1 |
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|8 |0 |0 |0 |1 |0 |
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|9 |1 |0 |0 |1 |0 |
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|A |0 |1 |0 |1 |0 |
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|B |1 |1 |0 |1 |0 |
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|C |0 |0 |1 |1 |0 |
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|D |1 |0 |1 |1 |0 |
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|E |0 |1 |1 |1 |0 |
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|F |1 |1 |1 |1 |0 |
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FCC documents
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-------------
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https://fccid.io/RPKFC660C
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- schematic: https://fccid.io/pdf.php?id=1888185
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- part list: https://fccid.io/pdf.php?id=1888184
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Datasheets
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----------
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- Hirose DF14A-20P-1.25H: http://www.mouser.com/ds/2/185/DF14_catalog-939195.pdf
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- LV07A: http://www.ti.com/lit/ds/symlink/sn74lv07a.pdf
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- LV138A: http://www.ti.com/lit/ds/symlink/sn74lvc138a.pdf
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- LV4051A: http://www.ti.com/lit/ds/symlink/sn74lv4051a.pdf
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- AD5258: http://www.analog.com/media/en/technical-documentation/data-sheets/AD5258.pdf
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3.3V power supply
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-----------------
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LV07A and LVC138A are 5V-tolerant and can be powered with 5V, the keyboard will work only with 5V power supply.
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It may not be completely safe to operate LV138A with 5V Vcc, its datasheet says:
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> Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
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Resources
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---------
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- Pics https://imgur.com/a/4UKkZ
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- Pics: https://imgur.com/a/UTR8Z
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