30 * Main - Connect to all ISSI Chips - Also break out header for debugging
32 PTB0 - SCL0 (add header pin, label as SCL0)
33 PTB1 - SDA0 (add header pin, label as SDA0)
35 * Reserved for I2C usage
37 PTC10 - SCL1 (Reserved, can use as GPIO)
38 PTC11 - SDA1 (Reserved, can use as GPIO)
40 * ISSI Control (enough pins for 3 chips reserved)
43 PTB18 - INTB Chip 2 (Reserved, can use as GPIO)
44 PTB19 - INTB Chip 3 (Reserved, can use as GPIO)
46 PTB16 - SDB (tied to all Chips, hardware shutdown)
53 NHD-C12832A1Z-FS(RGB)-FBW-3V
64 NHD-C12832A1Z-FS(RGB)-FBW-3V
69 PTC7 - A0 (Not SPI, used for display)
70 PTC8 - RST (Not SPI, used for display)
84 * Comm - For bi-directional communication between halves
86 PTA1 - RX0 (Master Side)
87 PTA2 - TX0 (Master Side)
89 PTE0 - TX1 (Slave Side)
90 PTE1 - RX1 (Slave Side)
92 PTD2 - RX2 (UART Debug Header)
93 PTD3 - TX2 (UART Debug Header)
100 * SWD - (Main reflash header)
107 PTA5 (LED only for PCB, not Teensy)
111 PTD2 - RX2 (UART Debug Header, label as RX2)
112 PTD3 - TX2 (UART Debug Header, label as TX2)