Pin assignmets for RAMPS 1.6 board.
Note 1: Limit pins are not interrupt capable so hard limits cannot be enabled.
Note 2: Limit pins are wired to external pullup resistors, MCU pulldown cannot be used.
Note 3: Control pins (Reset, Feed hold, Cycle start) do not support MCU pullup/pulldown resistors.
Uncomment #define BOARD_RAMPS16 in my_machine.h to use this mapping.
[ ]
[ ] GND
RESET [ ] R [13] B4.28
3V3 [ ] E [12] P2.12
3V3 [ ] - [11] P1.20
GND [ ] A [10] P2.5 - Spindle PWM
GND [ ] R [09] P2.4
VIN [ ] M [08] P2.7
X step - P2.1 [A0] [07] -
X dir - P0.11 [A1] L [06] P1.21
Y enable - P0.19 [A2] P [05] P1.19 - Spindle dir
Reset** - P0.27 [A3] C [04] P1.18 - Spindle enable
Feed hold** - P0.28 [A4] 1 [03] P1.24 - X limit min
Cycle start - P2.6 [A5] 7 [02] P1.25 - X limit max
Y step - P2.2 [A6] 6 [01] P0.2 - TXD0
Y dir - P0.20 [A7] 8 [00] P0.3 - RXD0
Z enable - P0.21 [A8] [14] P1.26 - Y limit min
Coolant - P0.26 [A9] [15] P1.27 - Y limit max
- [A10] [16] P0.16
- [A11] [17] P0.18
- [A12] [18] P1.29 - Z limit min
P0.23 [A13] [19] P1.28 - Z limit max
P0.24 [A14] [20] P0.0
P0.25 [A15] [21] P0.1
P0.10 - X enable ------------------------------------+ +-------------------------------------------- B step - P2.8 (E2)
- ------------------------------------------+ | | +---------------------------------------- B dir - P2.13 (E2)
- -------------------------------------+ | | | | +------------------------------------------- -
- --------------------------------+ | | | | | | +--------------------------- B enable - P4.29 (E2)
P2.3 - Z step ------------------+ | | | | | | | | +------------------------- A dir - P0.5 (E1)
P0.22 - Z dir --------------+ | | | | | | | | | | +------------------- A step - P2.0 (E1)
P0.17 ------- ---------+ | | | | | | | | | | | | +------------ A enable - P0.4 (E1)
P0.15 ------------+ | | | | | | | | | | | | | | +------------------ -
[GND] [52] [50] [48] [46] [44] [42] [40] [38] [36] [34] [32] [30] [28] [26] [24] [22] [3V3]
[GND] [53] [51] [49] [47] [45] [43] [42] [39] [37] [35] [33] [31] [29] [27] [25] [23] [3V3]
P1.23 - Aux 0* ---+ | | | | | | | | | | | | | | +------------------ P0.15
P0.18 - Aux 1* --------+ | | | | | | | | | | | | +----------------------- -
P1.31 - Aux 2* -------------+ | | | | | | | | | | +---------------------------- -
- ---------------------------+ | | | | | | | | +--------------------------------- -
- --------------------------------+ | | | | | | +-------------------------------------- P3.26
- -------------------------------------+ | | | | +------------------------------------------- P3.25
P1.22 ------------------------------------------+ | | +------------------------------------------------ P2.11
- -----------------------------------------------+ + ---------------------------------------------------- P1.30
* Aux output pins are optional and must be enabled in the board map file. ** Pull-up or pull-down cannot be enabled for these pins.
2023-08-24