This is an old revision of the document!
| ~ ARM Pin | | ~ mBed Pin | | ~ LPCXpresso Pin | | ~ Smoothieboard 1.0 | |
(Proposed) ||~ Comment ||
| P0.0 | | P9 | | 9 | | i2c1 sda | | i2c1 sda | | All: Internal I2C bus. Used for digipots and port expander. | |
| P0.1 | | P10 | | 10 | | i2c1 scl | | i2c1 scl | | All: Internal I2C bus. Used for digipots and port expander. | |
| P0.2 | | USBTX | | 21 | | uart0 txd | | uart0 txd | | All: Used for ISP programming of the bootloader and for debugging. | |
| P0.3 | | USBRX | | 22 | | uart0 rxd | | uart0 rxd | | All: Used for ISP programming of the bootloader and for debugging. | |
| P0.4 | | P30 | | 38 | | alpha_en_pin | | blue | spare | | |
note: also is rs485 rd2 ||
| P0.5 | | P29 | | 39 | | alpha_dir_pin | | blue | spare | |
note: also is rs485 td2 ||
| P0.6 | | P8 | | 8 | | spi1 ssel | | spi1 ssel | | All: sdcard | |
| P0.7 | | P7 | | 7 | | spi1 sck | | spi1 sck | | All: sdcard | |
| P0.8 | | P6 | | 6 | | spi1 miso | | spi1 miso | | All: sdcard | |
| P0.9 | | P5 | | 5 | | spi1 mosi | | spi1 mosi | | All: sdcard | |
| P0.10 | | P28 | | 40 | | beta_en_pin | | blue | | | |
uart1 txd || 1.5: connected to edison uart1 rxd _
note: also i2c2 sda ||
| P0.11 | | P27 | | 41 | | beta_dir_pin | | blue |
uart1 rxd || 1.5: connected to edison uart1 txd _
note: also i2c2 scl ||
fpga sck || 1.0: User spi port. used for rrd glcd _
1.5: connected as master to fpga if populated, otherwise connected as slave to edison ||
fpga ssel || 1.0: User spi port. used for rrd glcd cs _
1.5: connected as master to fpga if populated, otherwise connected as slave to edison ||
fpga miso || 1.0: User spi port _
1.5: connected as master to fpga if populated, otherwise connected as slave to edison ||
fpga mosi || 1.0: User spi port. used for rrd glcd _
1.5: connected as master to fpga if populated, otherwise connected as slave to edison ||
| P0.19 | | - | | Pad17 | | gamma_en_pin | | blue | mosfet5 | |
note: also i2c3 sda on lpcxpresso e2prom ||
| P0.20 | | - | | Pad18 | | gamma_dir_pin | | blue | mosfet6 | |
note: also i2c3 scl on lpcxpresso e2prom ||
| P0.21 | | - | | 23 | | delta_en_pin | | blue | servo1 | | | |
| P0.22 | | - | | 24 | | delta_dir_pin | | blue | servo2 | | note: lpcxpresso led | |
| P0.23 | | P15 | | 15 | | hotend.thermistor_pin | | adc0 thermistor0 | | | | |
| P0.24 | | P16 | | 16 | | bed.thermistor_pin | | adc1 thermistor1 | | | | |
| P0.25 | | P17 | | 17 | | thermistor2 | | adc2 thermistor2 | | | | |
| P0.26 | | P18 | | 18 | | thermistor3 | | blue | adc3 dac | | 1.5: not used for thermistor anymore | |
| P0.27 | | - | | 25 | | i2c0 sda | | i2c0 sda | | All: User i2c port. Not used | | |
| P0.28 | | - | | 26 | | i2c0 scl | | i2c0 scl | | All: User i2c port. Not used | | |
| P0.29 | | 31 | | 37 | | USB-D+ | | USB-D+ | | | | |
| P0.30 | | 32 | | 36 | | USB-D- | | USB-D- | | | | |
| | | | | | | | | | | | | |
| P1.0 | | | | | | eth txd0 | | eth txd0 | | | | |
| P1.1 | | | | | | eth txd1 | | eth txd1 | | | | |
| P1.4 | | | | | | eth tx en | | eth tx en | | | | |
| P1.8 | | | | | | eth crs | | eth crs | | | | |
| P1.9 | | | | | | eth rxd0 | | eth rxd0 | | | | |
| P1.10 | | | | | | eth rxd1 | | eth rxd1 | | | | |
| P1.14 | | | | | | eth rx err | | eth rx err | | | | |
| P1.15 | | | | | | eth ref clk | | eth ref clk | | | | |
| P1.16 | | | | | | eth mdc | | eth mdc | | | | |
| P1.17 | | | | | | eth mdio | | eth mdio | | | | |
| P1.18 | | LED1 | | Pad1 | | led1 | | led1 | | | | |
| P1.19 | | - | | Pad2 | | led2 | | led2 | | | | |
| P1.20 | | LED2 | | Pad3 | | led3 | | led3 | | | | |
| P1.21 | | LED3 | | Pad4 | | led4 | | led4 | | | | |
| P1.22 | | - | | Pad5 | | 3rd small fet | | blue | alpha min endstop | | 1.0: spare on 3 and 4 driver boards | |
| P1.23 | | LED4 | | Pad6 | | 3rd large fet | | blue | mosfet2 | | 1.0: spare on 3 and 4 driver boards | |
| P1.24 | | - | | Pad7 | | alpha_min_endstop | | blue | mosfet3 | | | |
| P1.25 | | - | | Pad8 | | alpha_max_endstop | | alpha max endstop | | | | |
| P1.26 | | - | | Pad9 | | beta_min_endstop | | blue | mosfet4 | | | |
| P1.27 | | - | | Pad10 | | beta_max_endstop | | blue | | | | |
fpga clkin || 1.5: clock output to fpga; recommended for rrd click/buzz if fpga not populated ||
| P1.28 | | - | | Pad11 | | gamma_min_endstop | | gamma min endstop | | | | |
| P1.29 | | - | | Pad12 | | gamma_max_endstop | | gamma max endstop | | | | |
| P1.30 | | P19 | | 19 | | spare | | blue | beta min endstop | | 1.0: used for click button on rrd glcd | |
| P1.31 | | P20 | | 20 | | spare | | blue | adc5 thermistor3 | | | |
1.5: used for 4th thermistor ||
| | | | | | | | | | | | | |
| P2.0 | | P26 | | 42 | | alpha_step_pin | | alpha step | | | | |
| P2.1 | | P25 | | 43 | | beta_step_pin | | beta step | | | | |
| P2.2 | | P24 | | 44 | | gamma_step_pin | | gamma step | | | | |
| P2.3 | | P23 | | 45 | | delta_step_pin | | delta step | | | | |
| P2.4 | | P22 | | 46 | | psu.output_pin | | blue | alpha dir | | | |
| P2.5 | | P21 | | 47 | | bed.heater_pin | | blue | beta dir | | | |
| P2.6 | | - | | 48 | | fan.output_pin | | blue | gamma dir | | | |
| P2.7 | | - | | 49 | | hotend.heater_pin | | blue | delta dir | | | |
| P2.8 | | - | | 50 | | epsilon_step_pin | | epsilon step | | All: spare on 3 and 4 driver | | |
| P2.9 | | - | | Pad19 | | USB soft connect | | USB soft connect | | | | |
| P2.10 | | - | | 51 | | ISP button | | ISP button | | | | |
| P2.11 | | - | | 52 | | spare | | | | | | |
fpga program || 1.0: used for pause/kill/back pin on glcd _
1.5: fpga reset pin; recommended for rrd click/buzz if fpga not populated ||
| P2.12 | | - | | 53 | | pause button | | All: play/pause button | | | | |
| P2.13 | | - | | 27 | | epsilon_dir_pin | | epsilon dir | | All: spare on 3 and 4 driver | | |
| | | | | | | | | | | | | |
| P3.25 | | - | | Pad13 | | spare | | blue | 5v pwm out | | 1.0: used for encoder pin for all panels | |
| P3.26 | | - | | Pad14 | | spare | | blue | mosfet1 | | 1.0: used for encoder pin for all panels | |
| P4.28 | | - | | Pad15 | | play/pause led | | play/pause led | | | | |
| P4.29 | | - | | Pad16 | | epsilon_en_pin | | blue | beta max endstop | | 1.0: spare on 3 and 4 driver | |
NOTE The italicized pins are hardcoded and would need to be changed in the source code (P0.2, P0.3, P0.6 - P0.9, P0.29, P0.30, P2.9, P2.10) The rest are soft configurable in config.
v1.5 NOTES The blue|blue tagged pins have had their function changed for Smoothieboard v1.5
| ~ Chip Pin | | ~ Module Pin | | ~ Breakout Pin | | ~ Arduino Pin | | ~ Smoothieboard 1.5 | | ~ Comment | |
| GP109 | | 55 | | J17.11 | | | | spi5 sck | | | |
| GP110 | | 53 | | J18.10 | | | | spi5 ssel a | | | |
| GP111 | | 51 | | J17.10 | | | | spi5 ssel b | | | |
| GP114 | | 59 | | J18.11 | | | | spi5 misi | | | |
| GP115 | | 57 | | J17.12 | | | | spi5 moso | | | |
| GP129 | | 63 | | J18.12 | | D4 | | | | connected to mcu reset | |
| GP130 | | 61 | | J18.13 | | D0 | | uart1 rx | | connected to mcu uart1 txd | |
| GP131 | | 46 | | J19.8 | | D1 | | uart1 tx | | connected to mcu uart1 rxd | |
| | | | | | | | | | | | |
| GP77 | | 60 | | J19.12 | | | | - | | host breakout: sd0 cd | |
| GP78 | | 58 | | J20.11 | | | | - | | host breakout: sd0 clk | |
| GP79 | | 62 | | J20.12 | | | | - | | host breakout: sd0 cmd | |
| GP80 | | 66 | | J20.13 | | | | - | | host breakout: sd0 d0 | |
| GP81 | | 70 | | J20.14 | | | | - | | host breakout: sd0 d1 | |
| GP82 | | 64 | | J19.13 | | | | - | | host breakout: sd0 d2 | |
| GP83 | | 68 | | J19.14 | | | | - | | host breakout: sd0 d3 | |
| GP84 | | 44 | | J20.8 | | | | - | | host breakout: sd0 clk fb | |
| GP134 | | 22 | | J20.3 | | | | - | | host breakout: uart2 rxd | |
| GP135 | | 27 | | J17.5 | | | | - | | host breakout: uart2 txd | |
| | | | | | | | | | | | |
| GP40 | | 52 | | J19.10 | | | | - | | panel breakout: spi2 sck | |
| GP41 | | 54 | | J20.10 | | | | - | | panel breakout: spi2 ssel | |
| GP42 | | 50 | | J20.9 | | | | - | | panel breakout: spi2 moso | |
| GP43 | | 56 | | J19.11 | | | | - | | panel breakout: spi2 misi | |
| | | | | | | | | | | panel breakout: enc a | |
| | | | | | | | | | | panel breakout: enc b | |
| | | | | | | | | | | panel breakout: click | |
| | | | | | | | | | | panel breakout: button | |
| | | | | | | | | | | panel breakout: buzz | |
One/Pro/Duo ||~ Zpuino Pin ||~ Smoothieboard 1.5 ||~ Comment ||
| B1.40P | | BH3 | | P62 | | mcu clkout | | | |
| B1.40N | | osc in | | - | | osc in | | | |
| B2.1P | | | | | | spi0 sck | | main fpga spi slave port | |
| B2.1N | | | | | | fpga m0 | | tied high for serial slave programming | |
| B2.3P | | | | | | spi0 mosi | | main fpga spi slave port | |
| B2.3N | | | | | | spi0 miso | | main fpga spi slave port | |
| B2.13P | | | | | | fpga m1 | | tied high for serial slave programming | |
| B2.56P | | | | | | fpga init | | tied high to boot immediately | |
| B2.65N | | | | | | spi0 ssel | | main fpga spi slave port | |
1.5 new functions: dac, 5v pwm out, edison uart, 2 servos; optional function (not populated and pins free by default): rs485
the 5 enable pins will go on an 8 pin i2c io expander (PCA9554B); MS1, MS2, and RESET/SLEEP stepper pins will have pull-ups to expander pins
expander pins unassigned: 0
mcu pins spared without fpga: 2
mcu pins spared without edison: 2
mcu pins unassigned: 0
functions unassigned: 0
for rrd display support recommended that rs485 pins be used for encoder and two fpga pins be used for buttons
balance: 0 mcu pins remaining
I'm pretty sure this is currently 1 pin short of full backwards compatibility