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PIN_LAYOUT.txt
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PIN_LAYOUT.txt
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ATMEGA 8
PB0 - LDAC_PIN (DA8568)
PB1 - CLR_PIN (DA8568)
PB2 - SS
PB3 - MOSI
PB4 - MISO
PB5 - SCK
PB6 - XTAL (16 MHz)
PB7 - XTAL (16 MHz)
PC0 ADC0 - (BUTTON) Button input pin
PC1 ADC1 - (LED) LED output pin
PC2 ADC2 - (POTI) - used for CLOCK DIVISION RATE 1
PC3 ADC3 - (POTI) - used for CLOCK DIVISION RATE 2
PC4 ADC4 - (POTI) - used for LFO RATE 1
PC5 ADC5 - (POTI) - used for LFO RATE 2
PC6 - RESET
PD0 - RXD (MIDI-IN)
PD1 - TXD
PD2 - (GATE1)
PD3 - (GATE2)
PD4 - (GATE3)
PD5 - (GATE4)
PD6 - (CE_PIN)
PD7 - (PL_PIN)
SHIFTREGISTER 74HC165
VCC (16) - 5V
GND ( 8) - GND
D7 ( 6) - POLYPHONIC/UNISON SWITCH (BIT 0)
... ( 5) ( 4) ( 3) (14) (13) (12)
D0 (11) - NOT USED BY NOW (BIT 8)
CE (15) - PD6
CP ( 2) - PB5 (SCK)
PL ( 1) - PD7
DS (10) - PB3 (MOSI)
Q7 ( 9) - PB4 (MISO)
!Q7 ( 7) - N.C.
SHIFTINREGISTER 1
D7 ( 6) - MIDI_CHANNEL_BIT0
D6 ( 5) - MIDI_CHANNEL_BIT1
D5 ( 4) - MIDI_CHANNEL_BIT2
D4 ( 3) - MIDI_CHANNEL_BIT3
D3 (14) - reserved
D2 (13) - MODE_BIT0 (polyphonic/unison)
D1 (12) - MODE_BIT1 reserved
D0 (11) - LFO_CLOCK_ENABLE_BIT - lfo enable meaning velocity disabled and vice versa
SHIFTINREGISTER 2
D7 ( 6) - LFO0_WAVE_BIT0
D6 ( 5) - LFO0_WAVE_BIT1
D5 ( 4) - LFO0_CLOCKSYNC
D4 ( 3) - LFO0_RETRIGGER_ON_NEW_NOTE
D3 (14) - LFO1_WAVE_BIT0
D2 (13) - LFO1_WAVE_BIT1
D1 (12) - LFO1_CLOCKSYNC
D0 (11) - LFO1_RETRIGGER_ON_NEW_NOTE
AD5668
LDAC (1) - PB0
SYNC (2) - PB2 (SS)
VDD (3) - 5V
VOUTA (4) - KV1
VOUTC (5) - KV3
VOUTE (6) - VV1
VOUTG (7) - VV3
VREF (8) - N.C. (critical!)
CLR (9) - PB1
VOUTH (10) - VV4
VOUTF (11) - VV2
VOUTD (12) - KV4
VOUTB (13) - KV2
GND (14) - GND
DIN (15) - PB3 (MOSI)
SCK (16) - PB5 (SCK)
TL074D (same again for Velocity -> every KV is VV and every KDB is VOUT)
1OUT KV1 10kOhm-Trimmer->((1IN-) AND (4.7kOhm->GND))
1IN- see 1OUT
1IN+ KBDV1
2OUT KV2 10kOhm-Trimmer->((2IN-) AND (4.7kOhm->GND))
2IN- see 2OUT
2IN+ KBDV2
3OUT KV3 10kOhm-Trimmer->((3IN-) AND (4.7kOhm->GND))
3IN- see 3OUT
3IN+ KBDV3
4OUT KV4 10kOhm-Trimmer->((4IN-) AND (4.7kOhm->GND))
4IN- see 4OUT
4IN+ KBDV4
VCC+ +12V
VCC- -12V