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---
description: "Me documenting my 64x64 LED matrix display"
created: 2025-03-11
---
## Chips
1. CHIPONE `ICN74HC245TS` `A14276CA`
2. `MBI5124GP` `A3YN72CTHB`
3. `RUC7258` `8W913170`
## Display IN connector
```
┌────────┐
R1 ┤ 1 40 ├ G1
B1 ┤ 2 38 ├ N
R2 ┤ 4 36 ├ G2
B2 ┤ 6 34 ├ LE
LA ┤ 8 21 ├ LB
LC ┤ 10 17 ├ LD
CLK ┤ 13 15 ├ LAT
OE ┤ 14 ⏚ ├ GND
└────────┘
```
## ESP32 S2 Mini wiring
---
https://github.com/mrcodetastic/ESP32-HUB75-MatrixPanel-DMA
```c++
#define R1_PIN 1
#define G1_PIN 40
#define B1_PIN 2
#define R2_PIN 4
#define G2_PIN 36
#define B2_PIN 6
#define A_PIN 8
#define B_PIN 21
#define C_PIN 10
#define D_PIN 17
#define E_PIN 34 // required for 1/32 scan panels, like 64x64px. Any available pin would do, i.e. IO32
#define LAT_PIN 15
#define OE_PIN 14
#define CLK_PIN 13
HUB75_I2S_CFG::i2s_pins _pins={R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN};
HUB75_I2S_CFG mxconfig(
64, // Module width
64, // Module height
1, // chain length
_pins, // pin mapping
);
dma_display = new MatrixPanel_I2S_DMA(mxconfig);
```
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