BasicX-24 Pin Definitions
 
 
Pin Primary Function Primary Description Alternate Function Alternate Description
1 Com1 Transmit BX-24 High Speed Com Port Serial Download Transmit See COM Ports
2 Com1 Receive BX-24 High Speed Com Port Serial Download Receive
See COM Ports
3 ATN Line Used for Serial Downloading  
 
4 Ground Common with Pin23   See Below for DC Characteristics
5 PortC, Bit 7 General Purpose I/O Port    
6 PortC, Bit 6 General Purpose I/O Port    
7 PortC, Bit 5 General Purpose I/O Port     
8 PortC, Bit 4 General Purpose I/O Port    
9 PortC, Bit 3 General Purpose I/O Port    
10 PortC, Bit 2 General Purpose I/O Port    
11 PortC, Bit 1 General Purpose I/O Port Interrupt Pin  
12 PortC, Bit 0 General Purpose I/O Port Input Capture Pin  
13 PortA, Bit 7 ADC Channel 7 General Purpose I/O Port  
14 PortA, Bit 6 ADC Channel 6 General Purpose I/O Port  
15 PortA, Bit 5 ADC Channel 5 General Purpose I/O Port  
16 PortA, Bit 4 ADC Channel 4 General Purpose I/O Port  
17 PortA, Bit 3 ADC Channel 3 General Purpose I/O Port  
18 PortA, Bit 2 ADC Channel 2 General Purpose I/O Port  
19 PortA, Bit 1 ADC Channel 1 General Purpose I/O Port  
20 PortA, Bit 0 ADC Channel 0 General Purpose I/O Port  
21 VCC +5 output from on-chip regulator (when powered at Vin) 4.8-5.5VDC Power input (when Vin not used)  
22 Reset Low Active Reset    
23 Ground Common with Pin4   See Below for DC Characteristics
24

Vin

5.5 to 15VDC

Input to 5 volt regulator. If +5V power is connected directly to VCC, pin may be left unconnected   See Below for DC Characteristics
 
Pins outside standard Dip package area:
25 PortD, Bit 7 Red LED General Purpose I/O Pin
26 PortD, Bit 5 Green LED General Purpose I/O Pin
27 PortD, Bit 4 OC1B General Purpose I/O Pin
 
SPI Header pinout
 
Name
Function
Pin Location
Hole 1
VCC
+ 5 from the BX-24
Hole closest to Pin 24
Hole 2
Reset
BX-24s reset line
Hole 3
SCK
SPI Clock
Hole 4
MISO
SPI Receive
Hole 5
MOSI
SPI Transmit
Hole 6
Gnd
Ground
Hole 7
CS
32K EEPROM Chip select
Hole closest to Pin 1

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